Anti-Inflammatory Diet Home Page...
 
Web Level1Diet.com
Subscribe to Anti-Inflammatory Diet RSS feeds...
Subscribe
Free Anti-inflammatory diet summary... Anti-inflammation diet weight loss story... 
Home Foods to Eat Foods to Avoid Exercise Supplements Weight Loss News Diabetes News Your Concerns Archived Reports

Bookmark Us: Yahoo Del.icio.us Simpy Technorati Email a friend Print

Trans Fat Health Risks: Cardiovascular Disease, Obesity, Diabetes, Cancer, Inflammation, Liver Dysfunction, High LDL/HDL Radio (High Cholesterol), High CRP Levels

Have we helped you?

The jury may be out for a while on a "death sentence", but the main verdict is in: Trans fats are about the worst thing you can put into your mouth. And, we Americans have been gulping the creamy, slimy stuff for decades.

Is this the culprit behind our epidemic of diabetes, obesity and other inflammatory disease? Many scientists think so.

However, the U.S. Federal Government (the F.D.A. especially) is reluctant to indict an entire food industry, effecting many thousands of jobs and billions of dollars in gross sales.

The FDA has offered a moderate position on trans fats, requiring new labeling laws that take effect soon (read below).

Some laws are already in force. Regardless, local and state officials are passing laws to forbid any detectible amounts of trans fats in foods sold in stores, served in restaurants, or offered in trade in their jurisdictions.

Where will this end? We hope not soon. We support strict bans on trans fats across the board.

Trans fatty acids (commonly termed trans fats) are a type of unsaturated fat (and may be monounsaturated or polyunsaturated).

Trans fats occur naturally, in small quantities, in meat and dairy products from ruminants. Most trans fats consumed today, however, are industrially created as a side effect of partial hydrogenation of plant oils -- a process developed in the early 1900s and first commercialized as Crisco in 1911. Partial hydrogenation changes a fat's molecular structure (raising its melting point and reducing rancidity) but this process also results in a proportion of the changed fat becoming trans fat.

Unlike other fats, trans fats are neither required nor beneficial for health.[1] Eating trans fat increases the risk of coronary heart disease.[2] For these reasons, health authorities worldwide recommend that consumption of trans fat be reduced to trace amounts. Trans fats from partially hydrogenated oils are generally considered to be more of a health risk than those occurring naturally.[3]

Trans fats are increasingly being linked to chronic health conditions, are tightly regulated in a few countries, are mandatory on product labels in many others, and are the central issue in several ongoing lawsuits (particularly against fast food outlets). Many companies are voluntarily removing trans fats from their products, or establishing trans-free product lines.

Chemically, trans fats are made of the same building blocks as non-trans fats, but have a different shape. In trans fat molecules, the double bonds between carbon atoms (characteristic of all unsaturated fats) are in the trans rather than the cis configuration, resulting in a straighter, rather than a kinked shape. As a result, trans fats are less fluid and have a higher melting point than the corresponding cis fats.

EDITORIAL NOTE: Trans fats or trans fatty acids are artificial side products generated during the manufacture of partially hydrogenated oils. Partially hydrogenated oils are used to extend the shelf life and enhance the smooth, creamy texture of processed foods, especially snacks like muffins, cookies, cakes and pastries sold in boxes or shipped to stores for sale days or weeks later.

Trans fats are produced in vast quantities during the high pressure, high temperature preparation of partially hydrogenated oils for use in foods. Up to 45% of the total weight of these oils can come from trans fats. While trans fats are not desirable, they are a necessary by product of the way these oils are made. New processes are able to reduce the oils to only 5-6% of the total weight. This enables some unscrupulous manufacturers to claim their food products are "trans fat free", by current standards. We strongly encourage that governmental agencies consider adjusting their standards so that zero or near-zero amounts of trans fat is required to qualify for the claim "trans fat free" for their manufactured or processed foods. Until then, we recommend all consumers simply avoid any food that may have partially hydrogenated oils in them, regardless of any claim printed on food labels.

Trans fats occur naturally in the milk and body fat of ruminants (such as cows and sheep) at a level of 2-5% of total fat.[4] Natural trans fats, which include conjugated linoleic acid and vaccenic acid, originate in the rumens of these animals.

Animal-based fats were once the only trans fats consumed, but by far the largest amount of trans fat consumed today is created by the processed food industry as a side-effect of partially hydrogenating unsaturated plant fats (generally vegetable oils). These hydrogenated fats have displaced natural solid fats and liquid oils in many areas, notably in the fast food, snack food, fried food and baked good industries.

Partially hydrogenated oils are attractive to food manufacturers for several reasons. Partial hydrogenation reduces rancidity and consequently increases product shelf life and decreases refrigeration requirements. Because baking requires semi-solid fats, partially hydrogenated oils can replace the animal fats traditionally used by bakers (such as butter and lard); they are also a readily available alternative to semi-solid tropical oils such as palm oil. Because partially hydrogenated plant oils can replace animal fats, the resulting products can be consumed (barring other ingredient and preparation violations) by adherents to Kashrut (kosher) and Halal, as well as by adherents to vegetarianism in Buddhism, ahimsa in Jainism and Hinduism, veganism, and other forms of vegetarianism.

Foods containing artificial trans fats formed by partially hydrogenating plant fats may contain up to 45% trans fat compared to their total fat.[4] Baking shortenings generally contain 30% trans fats compared to their total fats, while animal equivalents such as butter and lard contain 3%. Those margarines not reformulated to reduce trans fats may contain up to 15% trans fat by weight.[5]

It has been established that trans fats in human milk fluctuate with maternal consumption of trans fat, and that the amount of trans fats in the bloodstream of breastfed infants fluctuates with the amounts found in their milk. Reported percentages of trans (compared to total fats) in human milk range from 1% in Spain, 2% in France and 4% in Germany to 7% in Canada.[6]

Trans fats are also found in shortenings commonly used for deep frying in restaurants. In the past, the decreased rancidity of partially hydrogenated oils meant that they could be reused for a longer time than conventional oils. Recently, however, non-hydrogenated vegetable oils have become available that have lifespans exceeding that of the frying shortenings.[7] As fast food chains routinely use different fats in different locations, trans fat levels in products can have large variation. An analysis of samples collected in 2004 and 2005 found that at McDonald's, for example, fries served in New York City contained twice as much trans fat as in Hungary, and 28 times as much trans fat as in Denmark (where trans fats are restricted). At KFC, the pattern was reversed with Hungary's product containing twice the fat of the New York product. Even within the US there was variation, with fries in New York containing 30% more trans fat than those from Atlanta.[8]

Nutritional Trans Fat Guidelines

The National Academy of Sciences (NAS) advises the United States and Canadian governments on nutritional science for use in public policy and product labeling programs. Their 2002 Dietary reference intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids [9] contains their findings and recommendations regarding consumption of trans fat (summary).

Their recommendations are based on two key facts. First, "trans fatty acids are not essential and provide no known benefit to human health",[1] whether of animal or plant origin.[10] Second, while both saturated and trans fats increase levels of LDL cholesterol (so-called bad cholesterol), trans fats also lower levels of HDL cholesterol (so-called good cholesterol) [2]; this increases the risk of coronary heart disease (CHD). The NAS is concerned "that dietary trans fatty acids are more deleterious with respect to CHD than saturated fatty acids".[2] This analysis is supported by a 2006 New England Journal of Medicine (NEJM) scientific review that states "from a nutritional standpoint, the consumption of trans fatty acids results in considerable potential harm but no apparent benefit."[3]

Because of these facts and concerns, the NAS has concluded there is no safe level of trans fat consumption. There is no adequate level, recommended daily amount or tolerable upper limit for trans fats. This is because any incremental increase in trans fat intake increases the risk of coronary heart disease.[2]

Despite this concern, the NAS dietary recommendations have not recommended the elimination of trans fat from the diet. This is because trans fat is naturally present in many animal foods, and therefore in most non-vegan diets; its removal from ordinary diets might introduce undesirable side effects and nutritional imbalances if proper nutritional planning is not undertaken. The NAS has therefore "recommended that trans fatty acid consumption be as low as possible while consuming a nutritionally adequate diet".[11] Like the NAS, the World Health Organization has tried to balance public health goals with a practical level of trans fat consumption, recommending in 2003 that trans fats be limited to less than 1% of overall energy intake.[4]

The US National Dairy Council has asserted that the trans fats present in animal foods are of a different type than those in partially hydrogenated oils, and do not appear to exhibit the same negative effects.[12] While a recent scientific review agrees with the conclusion (stating that "the sum of the current evidence suggests that the public health implications of consuming trans fats from ruminant products are relatively limited") it cautions that this may be due to the relatively low consumption of trans fats from animal sources compared to artificial ones.[3]

Trans Fats in Food: History

Nobel laureate Paul Sabatier worked in the 1890s to develop the chemistry of hydrogenation which enabled the margarine, oil hydrogenation, and synthetic methanol industries.[13] While Sabatier only considered hydrogenation of vapours, the German chemist Wilhelm Normann showed in 1901 that liquid oils could be hydrogenated and patented the process in 1902.[14] In 1909, Procter & Gamble acquired the US rights to the Normann patent[15]; in 1911, they began marketing the first hydrogenated shortening, Crisco (composed largely of partially hydrogenated cottonseed oil). Further success came from the marketing technique of giving away free cookbooks with every recipe calling for Crisco. Hydrogenation strongly stimulated whaling, as it made it possible to stabilize whale oil for human consumption.

Production of hydrogenated fats increased steadily until the 1960s as processed vegetable fats replaced animal fats in the US and other western countries. At first, the argument was a financial one due to lower costs; however, advocates also said that the unsaturated trans fats of margarine were healthier than the saturated fats of butter.[16] The Center for Science in the Public Interest (CSPI) campaigned against the use of saturated fats for fast food cooking starting in 1984. When fast food companies replaced the saturated fat with partially hydrogenated unsaturated fats, CSPI's campaign against them ended. While CSPI defended trans fats in their 1987 Nutrition Action newsletter, by 1992 CSPI began to speak against trans fats and is currently strongly against their use.[17]

There were suggestions in the scientific literature as early as 1988 that trans fats could be a cause of the large increase in coronary artery disease.[16][18] In 1994, it was estimated that trans fats caused 30,000 deaths annually in the US from heart disease.[19]

Chemistry

From a chemical perspective, fats are large E-shaped molecules that support three fatty acid groups connected to a short backbone derived from glycerol. What is commonly termed a trans fat is more accurately described as a fat that contains a trans fatty acid group. Fatty acid molecules consist of a backbone of carbon atoms, each with attached hydrogen atoms (as well as a carboxyl group ? located at the end of the molecule ? that we will not be concerned with in this discussion). Fatty acids are characterized as saturated or unsaturated based on the number of hydrogen atoms in the acid. If the molecule contains the maximum possible number of hydrogen atoms then it is saturated; otherwise, it is unsaturated.

Carbon atoms are tetravalent, forming four covalent bonds with other atoms, while hydrogen atoms bond with only one other atom. In saturated fatty acids, each carbon atom is connected to its two neighbour carbon atoms as well as two hydrogen atoms (see structure diagram, below). In unsaturated fatty acids the carbon atoms that are missing a hydrogen atom are joined by double bonds rather than single bonds (see structure graphic below) so that each carbon atom participates in four bonds.

Hydrogenation of an unsaturated fatty acid refers to the addition of hydrogen atoms to the acid, causing double bonds to become single ones as carbon atoms acquire new hydrogen partners (to maintain four bonds per carbon atom). Full hydrogenation results in a molecule containing the maximum amount of hydrogen (in other words the conversion of an unsaturated fatty acid into a saturated one). Partial hydrogenation results in the addition of hydrogen atoms at some of the empty positions, with a corresponding reduction in the number of double bonds. Commercial hydrogenation is typically partial in order to obtain a malleable fat that is solid at room temperature, but melts upon baking (or consumption).

In most naturally occurring unsaturated fatty acids, the hydrogen atoms are on the same side of the double bonds of the carbon chain (cis configuration ? meaning "on the same side" in Latin). However, partial hydrogenation reconfigures most of the double bonds that do not become chemically saturated, twisting them so that the hydrogen atoms end up on different sides of the chain. This type of configuration is called trans, which means "across" in Latin. Diagram of the molecular structure of different fatty acids Saturated fat Cis-unsaturated fatty acid Trans-unsaturated fatty acid saturated carbon atoms (each with 2 hydrogens) joined by a single bond unsaturated carbon atoms (each with 1 hydrogen) joined by a double bond. Cis configuration. unsaturated carbon atoms (each with 1 hydrogen) joined by a double bond. Trans configuration.

The same molecule, containing the same number of atoms, with a double bond in the same location, can be either a trans or a cis fatty acid depending on the conformation of the double bond. For example, oleic acid and elaidic acid are both unsaturated fatty acids with the chemical formula C18H34O2. They both have a double bond 9 carbon atoms from the end of the molecule. It is the conformation of this bond that sets them apart. The conformation has implications for the physical-chemical properties of the molecule. The trans configuration is straighter, while the cis configuration is noticeably kinked as can be seen from the following three-dimensional representation. These fatty acids are geometric isomers (chemically identical except for the arrangement of the double bond).

The trans fatty acid elaidic acid has different chemical properties owing to the slightly different bond configuration. Notably, it has a much higher melting point, 46.5 ?C rather than oleic acid's 13.5 ?C.

In food production, the goal is not to simply change the configuration of double bonds while maintaining the same ratios of hydrogen to carbon. Instead, the goal is to decrease the number of double bonds and increase the amount of hydrogen in the fatty acid. This changes the consistency of the fatty acid and makes it less prone to rancidity (in which free radicals attack double bonds). Production of trans fatty acids is therefore a side-effect of partial hydrogenation.

Researchers at the United States Department of Agriculture have investigated whether hydrogenation can be achieved without the side effect of trans fat production. They varied the pressure under which the chemical reaction was conducted ? applying 1400 kPa (200 psi) of pressure to soybean oil in a 2 litre vessel while heating it to between 140 ?C and 170 ?C. The standard 140 kPa (20 psi) process of hydrogenation produces a product of about 40% trans fatty acid by weight, compared to about 17% using the high pressure method. Blended with unhydrogenated liquid soybean oil, the high pressure processed oil produced margarine containing 5 to 6% trans fat. Based on current U.S. labeling requirements (see below) the manufacturer could claim the product was free of trans fat.[20] The level of trans fat may also be altered by modification of the temperature and the length of time during hydrogenation.

Trans fat levels may be measured. Measurement techniques include chromatography (by silver ion chromatography on thin layer chromatography plates, or small high performance liquid chromatography columns of silica gel with bonded phenylsulfonic acid groups whose hydrogen atoms have been exchanged for silver ions). The role of silver lies in its ability to form complexes with unsaturated compounds. Gas chromatography and mid-infrared spectroscopy are other methods in use.

Health risks

Partially hydrogenated vegetable oils have been an increasingly significant part of the human diet for about 100 years (particularly so in the latter half of the 20th century), and some deleterious effects of trans fat consumption are scientifically accepted, forming the basis of the health guidelines discussed above.

The exact biochemical methods by which trans fats produce specific health problems are a topic of continuing research. For example, the mechanisms through which trans fats contribute to coronary heart disease are fairly well understood, while the mechanism for trans fat's effect on diabetes is under investigation.

Coronary heart disease

The primary health risk identified for trans fat consumption is an elevated risk of coronary heart disease (CHD).[21] A comprehensive review of studies of trans fats was published in 2006 in the New England Journal of Medicine that concludes that there is a strong and reliable connection between trans fat consumption and CHD.[3]

The major evidence for the effect of trans fat on CHD comes from the Nurses' Health Study (NHS) ? a cohort study that has been following 120,000 female nurses since its inception in 1976.

Hu and colleagues analyzed data from 900 coronary events from the NHS population during 14 years of followup. He determined that a nurse's CHD risk roughly doubled (relative risk of 1.94, CI: 1.43 to 2.61) for each 2% increase in trans fat calories consumed (instead of carbohydrate calories). By contrast, it takes more than a 15% increase in saturated fat calories (instead of carbohydrate calories) to produce a similar increase in risk. Eating non-trans unsaturated fats instead of carbohydrates reduces the risk of CHD rather than increasing it.[22]

Hu also reports on the benefits of reducing trans fat consumption. Replacing 2% of food energy from trans fat with non-trans unsaturated fats more than halves the risk of CHD (53%). By comparison, replacing a larger 5% of food energy from saturated fat with non-trans unsaturated fats reduces the risk of CHD by 43%.[22]

There are two accepted measures of risk for coronary heart disease, both blood tests. The first considers ratios of two types of cholesterol, the other the amount of a cell-signaling cytokine called C-reactive protein. The ratio test is more accepted, while the cytokine test may be more powerful but is still being studied.[21] The effect of trans fat consumption has been documented on each as follows:

  • Cholesterol ratio: This ratio compares the levels of LDL (so-called "bad" cholesterol) to HDL (so-called "good" cholesterol). Trans fat behaves like saturated fat by raising the level of LDL, but unlike saturated fat it has the additional effect of decreasing levels of HDL. The net increase in LDL/HDL ratio with trans fat is approximately double that due to saturated fat.[23] (Higher ratios are worse.)

  • C-reactive protein (CRP): A study of over 700 nurses showed that those in the highest quartile of trans fat consumption had blood levels of CRP that were 73% higher than those in the lowest quartile.[24]

Another study considered deaths due to CHD, with consumption of trans fats being linked to an increase in mortality, and consumption of polyunsaturated fats being linked to a decrease in mortality.[21][25]

Other effects

There has been suggestion that the negative consequences of trans fat consumption go beyond the cardiovascular risk. In general, there is much less scientific consensus that eating trans fat specifically increases the risk of other chronic health problems:

  • Cancer: There is no scientific consensus that consumption of trans fats significantly increases cancer risks across the board.[21] The American Cancer Society states that a relationship between trans fats and cancer "has not been determined."[26] However, one recent study has found connections between trans fat and prostate cancer.[27]

  • Diabetes: There is a growing concern that the risk of type 2 diabetes increases with trans fat consumption.[21] However, consensus has not been reached.[3] For example, one study found that risk is higher for those in the highest quartile of trans fat consumption.[28] Another study has found no diabetes risk once other factors such as total fat intake and BMI were accounted for.[29]

  • Obesity: Research indicates that trans fat may increase weight gain and abdominal fat, despite a similar caloric intake.[30] A 6-year experiment revealed that monkeys fed a trans-fat diet gained 7.2% of their body weight, as compared to 1.8% for monkeys on a mono-unsaturated fat diet. Although obesity is frequently linked to trans fat in the popular media,[31] this is generally in the context of eating too many calories; there is no scientific consensus connecting trans fat and obesity.

  • Liver Dysfunction: Trans fats are metabolized differently by the liver than other fats and interfere with delta 6 desaturase. Delta 6 desaturase is an enzyme involved in converting essential fatty acids to arachidonic acid and prostaglandins, both of which are important to the functioning of cells.[32]

Public response and regulation

Canada & Trans Fats

Canada is one of the largest consumers of trans fats in the world.[33] In November 2004, an opposition day motion seeking a ban similar to Denmark's was introduced by Jack Layton of the New Democratic Party, and passed through the House of Commons by an overwhelming 193-73 vote.[34]

Since December 2005, Health Canada has required that food labels list the amount of trans fat in the nutrition facts section for most foods. Generally, products with less than 0.2 grams of trans fat per serving are considered to be free of trans fats and may be labeled as such (although this leads to questions of serving sizes). In Canada, trans fat quantities on labels include naturally occurring trans fats from animal sources.[35]

In June 2006, a task force co-chaired by Health Canada and the Heart and Stroke Foundation of Canada recommended a limit of 5% trans fat (to total fat) ratio in all products sold to consumers in Canada (2% for tub margarines and spreads).[4] The amount was selected such that "most of the industrially produced trans fats would be removed from the Canadian diet, and about half of the remaining trans fat intake would be of naturally occurring trans fats". This recommendation has been endorsed by the Canadian Restaurant and Foodservices Association[36] and the Food and Consumer Products of Canada has congratulated the task force on the report.[37]

Denmark & Trans Fats

Denmark became the first country to introduce laws strictly regulating the sale of many foods containing trans fats in March 2003, a move which effectively bans partially hydrogenated oils. Naturally present trace amounts of trans fats in dairy and meat products are unaffected by these bills. The UK campaigning body tfX offers an English translation on its Denmark's trans fat law page.

European Union & Trans Fats

The European Food Safety Authority was asked to produce a scientific opinion on trans fats.[38]

United Kingdom & Trans Fats

In October 2005, the Food Standards Agency (FSA) asked for better labeling in the UK.[39] In the 29 July 2006 edition of the British Medical Journal, an editorial also called for better labeling.[40][41]

United States & Trans Fats

Before 2006, consumers in the United States could not directly determine the presence (or quantity) of trans fats in food products. This information could only be inferred from the ingredient list, notably from the partially hydrogenated ingredients.

On July 11, 2003, the Food and Drug Administration (FDA) issued a regulation[42] requiring manufacturers to list trans fat on the Nutrition Facts panel of foods and some dietary supplements.[43] The new labeling rule allowed for immediate voluntary compliance with mandatory compliance by January 1, 2006 (although companies may petition for an extension to January 1, 2008). The regulation allows trans fat levels of less than 0.5 grams per serving to be labeled as 0 grams per serving. The FDA did not approve nutrient content claims such as "trans fat free" or "low trans fat," however the agency is planning a consumer study to evaluate the consumer understanding of such claims and perhaps consider a regulation allowing their use on packaged foods.[44] The FDA defines trans fats as containing one or more trans linkages that are not in a conjugated system. This is an important distinction, as it distinguishes non-conjugated synthetic trans fats from naturally occurring fatty acids with conjugated trans double bonds, such as conjugated linoleic acid.

Critics of the plan, including FDA advisor Dr. Carlos Camargo, have expressed concern that the 0.5 gram per serving threshold is too high to refer to a food as free of trans fat. This is because a person eating many servings of a product, or eating multiple products over the course of the day may still consume a significant amount of trans fat.[45] This can be compared to Canada in which the threshold is 0.2 grams. Despite this, the FDA estimates that by 2009, trans fat labeling will have prevented from 600 to 1,200 cases of coronary heart disease and 250 to 500 deaths each year. This benefit is expected to result from consumers choosing alternative foods lower in trans fats as well as manufacturers reducing the amount of trans fats in their products.

Some US cities are acting to reduce consumption of trans fats. In May 2005, Tiburon, California, became the first American city where all restaurants voluntarily cook with trans fat-free oils.[46]

New York City has embarked on a campaign to reduce consumption of trans fats, noting that heart disease is the primary cause of resident deaths. This has included a public education campaign (see trans fat pamphlet) and a request to restaurant owners to voluntarily eliminate trans fat from their offerings.[47] Finding that the voluntary program was not successful, New York City's Board of Health has solicited public comments on a proposal to ban artificial trans fats in restaurants.[48] The board voted to ban trans fat in restaurant food on December 5, 2006. New York is the first large US city to strictly limit trans fats in restaurants. Restaurants will be barred from using most frying and spreading fats containing artificial trans fats above 0.5 g per serving by July 1, 2007, and will have to meet the same target in all of their foods by July 1, 2008.[49]

Chicago is considering a ban on oils containing trans fats for large chain restaurants.[50] On December 19th, 2006, Massachusetts state representative Peter Koutoujian filed the first state level legislation that would ban restaurants from preparing foods with trans fats.[51]

Food industry response about Trans Fats

Some major food chains have chosen to remove or reduce trans fats in their products. In some cases these changes have been voluntary. In other cases, however, food vendors have been targeted by legal action that has generated a lot of media attention. In May 2003, BanTransFats.com Inc., a U.S. non-profit corporation, filed a lawsuit against the food manufacturer Kraft Foods in an attempt to force Kraft to remove trans fats from the Oreo cookie. The lawsuit was withdrawn when Kraft agreed to work on ways to find a substitute for the trans fat in the Oreo.

Similarly, in 2006, the Center for Science in the Public Interest sued KFC over its use of trans fats in fried foods.[52][53] KFC reviewed alternative oil options, saying "there are a number of factors to consider including maintaining KFC's unique taste and flavor of Colonel Sanders' Original Recipe."[54] On October 30, 2006, KFC announced that it will replace the partially hydrogenated soybean oil it currently uses with a trans-fat free low linolenic soybean oil in all restaurants in the US by April 2007, although its biscuits will still contain trans-fats.[55][56] Despite the US-specific nature of the lawsuit, KFC is making changes outside of the US as well; in Canada, KFC's brand owner is switching to trans-fat free Canadian canola oil by early 2007.[57]

Some well-publicized changeovers have not come to fruition. In 2002, McDonald's promised to reduce the trans fat in its frying oils, but delayed its plans several months later. In 2006, McDonald's announced it was making "very good progress" but had yet to replace its oils over worries the change would "jeopardize the iconic nature of [their] french fry". It stated, however, that it would be ready should New York City implement its proposed ban.[58]

The J.M. Smucker Company, American manufacturer of Crisco (the original partially hydrogenated vegetable shortening), has released a new formulation made from solid fully hydrogenated palm oil cut with soybean oil and sunflower oil. This blend yields an equivalent shortening much like the previous partially hydrogenated Crisco, and is labeled zero grams of trans fat per 1 tablespoon serving (as compared with 1.5 grams per tablespoon of original Crisco).[59] Crisco does not have a trans-free offering in other locations ? in Canada, for example, the lowest trans fat Crisco is Crisco Golden, which contains 0.4 grams of trans fat per serving.

The Walt Disney Company will begin getting rid of trans fats in meals at US theme parks (Disneyland, Walt Disney World, etc.) by the end of 2007, and will stop the inclusion of trans fats in licensed or promotional products by 2008.[60]. Starbucks also announced in 2007 it would cut trans fats from the products in half its stores.[61]

Trans Fat References

  1. Food and nutrition board, institute of medicine of the national academies (2005). Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (Macronutrients). National Academies Press, 423.
  2. Food and nutrition board, institute of medicine of the national academies (2005). Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (Macronutrients). National Academies Press, 504.
  3. Mozaffarian D, Katan MB, Ascherio A, Stampfer MJ, Willett WC (April 2006). "Trans Fatty Acids and Cardiovascular Disease". New England Journal of Medicine 354 (15): 1601-1613. PMID 16611951
  4. Trans Fat Task Force (June 2006). "TRANSforming the Food Supply". Retrieved on 2007-01-07.
  5. Hunter, JE (2005). "Dietary levels of trans fatty acids" basis for health concerns and industry efforts to limit use.". Nutrition Research 25: 499-513.
  6. Innis, Sheila M and King, D Janette (1999). "trans Fatty acids in human milk are inversely associated with concentrations of essential all-cis n-6 and n-3 fatty acids and determine trans, but not n-6 and n-3, fatty acids in plasma lipids of breast-fed infants". American Journal of Clinical Nutrition 70 (3): 383?390. PMID 10479201
  7. NYC Board of Health. Board of Health Approves Regulation to Phase Out Artificial Trans Fat: FAQ. Retrieved on 2007-01-07.
  8. "What's in that french fry? Fat varies by city", MSNBC, 2006-04-12. Retrieved on 2007-01-07. AP story concerning PMID 16611965
  9. Food and nutrition board, institute of medicine of the national academies (2005). Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (Macronutrients). National Academies Press, i.
  10. Food and nutrition board, institute of medicine of the national academies (2005). Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (Macronutrients). National Academies Press, 447.
  11. Food and nutrition board, institute of medicine of the national academies (2005). Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (Macronutrients). National Academies Press, 424.
  12. National Dairy Council (2004-06-18). "comments on 'Docket No. 2003N-0076 Food Labeling: Trans Fatty Acids in Nutrition Labeling'" (PDF). Retrieved on 2007-01-07.
  13. (1966) Nobel Lectures, Chemistry, 1901-1921. Elsevier. Reprinted online: Paul Sabatier, The Nobel Prize in Chemistry 1912. Nobel Foundation. Retrieved on 2007-01-07.
  14. Patterson, HBW (1998). "Hydrogenation". Sci Lecture Papers Series. Retrieved on 2007-01-07.
  15. Shurtleff, William; Akiko Aoyagi. History of Soybeans and Soyfoods: 1100 B.C. to the 1980s. Archived from the original on 2005-10-18.
  16. Ascherio A, Stampfer MJ, Willett WC. Trans fatty acids and coronary heart disease. Retrieved on 2006-09-14.
  17. Mary G. Enig, PhD. The Tragic Legacy of Center for Science in the Public Interest (CSPI). Retrieved on 2006-05-02.
  18. Booyens J, Louwrens CC, Katzeff IE (1988). "The role of unnatural dietary trans and cis unsaturated fatty acids in the epidemiology of coronary artery disease". Medical Hypotheses 25 (3): 175-182. PMID 3367809
  19. Willett WC, Ascherio A (1995). "Trans fatty acids: are the effects only marginal?". American Journal of Public Health 85 (3): 411-412. PMID 8179036
  20. FJ Eller (2005). "Preparation of spread oils meeting U.S. Food and Drug Administration Labeling requirements for trans fatty acids via pressure-controlled hydrogenation". Journal of Agricultural and Food Chemistry 53 (15): 5982?5984. PMID 16028984.
  21. TRANSforming the food supply, Appendix 9iiiConsultation on the health implications of alternatives to trans fatty acids: Summary of Responses from Experts
  22. Hu, FB; Stampfer, MJ, Manson, JE, Rimm, E, Colditz, GA, Rosner, BA, Hennekens, CH, Willett, WC (1997). "Dietary fat intake and the risk of coronary heart disease in women". New England Journal of Medicine 337 (21): 1491-1499. PMID 9366580. Online Copy (free with registration).
  23. A Ascherio (1999). "Trans fatty acids and coronary heart disease.". New England Journal of Medicine 340 (25): 1994?1998.
  24. Esther Lopez-Garcia (2005). "Consumption of Trans Fatty Acids Is Related to Plasma Biomarkers of Inflammation and Endothelial Dysfunction". The Journal of Nutrition 135 (3): 562?566. PMID 15735094.
  25. Oh, K; Hu, FB, Manson, JE, Stampfer, MJ, Willett, WC (2005). "Dietary fat intake and risk of coronary heart disease in women: 20 years of follow-up of the nurses' health study". American Journal of Epidemiology 161 (7): 672-679. PMID 15781956
  26. Common questions about diet and cancer
  27. Chavarro et al., "A prospective study of blood trans fatty acid levels and risk of prostate cancer," Proc. Amer. Assoc. Cancer Res., Volume 47, 2006 [1]
  28. Hu, FB; van Dam, RM, Liu, S (2001). "Diet and risk of Type II diabetes: the role of types of fat and carbohydrate". Diabetologia 44 (7): 805-817. PMID 11508264
  29. van Dam RM, Stampfer M, Willett WC, Hu FB, Rimm EB (2002). "Dietary fat and meat intake in relation to risk of type 2 diabetes in men". Diabetes care 25 (3): 417-424. PMID 11874924
  30. Gosline, Anna Why fast foods are bad, even in moderation New Scientist 12 June 2006
  31. e.g. Trans Fat Press Conference by Tommy G. Thompson, US Secretary of health and human services
  32. M Mahfouz (1981). "Effect of dietary trans fatty acids on the delta 5, delta 6 and delta 9 desaturases of rat liver microsomes in vivo". Acta biologica et medica germanica 40 (12): 1699?1705.
  33. Health Canada Trans Fat
  34. Dosanjh snubs House, MP says. Retrieved on 2006-05-02.
  35. Information letter: Labelling of trans fatty acids
  36. Restaurant industry commits to Trans Fat Task Force recommendations
  37. Food industry congratulates Trans Fat Task Force on report
  38. European Food Safety Authority Opinion of the Scientific Panel on Dietetic Products, Nutrition and Allergies on a request from the Commission related to the presence of trans fatty acids in foods and the effect on human health of the consumption of trans fatty acids The EFSA Journal (2004) 81, 1-49
  39. Gray, Richard. "Forced to own up to the killer fat in our food", Scotsman.com, February 5, 2006.
  40. BBC 27 July 2006 Call to label hidden fats in food
  41. Clarke, Robert; Lewington, Sarah Trans fatty acids and coronary heart disease British Medical Journal 2006;333:214 (29 July), doi:10.1136/bmj.333.7561.214
  42. (21 CFR 101.9 (c)(2)(ii)): Trans Fatty Acids in Nutrition Labeling
  43. FDA Acts to Provide Better Information to Consumers on Trans Fats. Food and Drug Administration. Retrieved on 2005-07-26.
  44. FDA Food Labeling: Trans Fatty Acids in Nutrition Labeling; Consumer Research to Consider Nutrient Content and Health Claims and Possible Footnote or Disclosure Statements
  45. Trans fat: 'Zero' foods add up
  46. Project Tiburon of Ban Trans Fats
  47. City of New York press release: Health department asks restaurateurs and food suppliers to voluntarily make an oil change and eliminate artificial trans fat
  48. Health department proposes two changes to city's health code for public comment
  49. Board of health votes to phase out artificial trans fat from New York City's restaurants
  50. Burke Serves Up Another Trans Fat Plan Southwest News Herald article
  51. Lawmaker wants to ban trans fats from Mass. restaurants
  52. KFC Sued for Fouling Chicken with Partially Hydrogenated Oil: Lawsuit Aimed at Eliminating, or Disclosing Use of Artery-Clogging Frying Oil
  53. Class Action Complaint
  54. The New York Times (Marian Burros) KFC Is Sued Over the Use of Trans Fats in Its Cooking 14 June 2006
  55. KFC announces switch to zero trans fat cooking oil following two-year test for same great taste (press release)
  56. BBC (Guto Harri) KFC cuts out unhealthy trans-fats 30 October 2006
  57. KFC Canada phasing in zero grams trans fat menu in all 786 restaurants nationally early in the new year (press release)
  58. "McDonald's CEO: Progress, No New Oil Yet (AP story)". Retrieved on November 15, 2006.
  59. Crisco nutritional facts
  60. Disney to serve healthier foods at parks Yahoo! news article on plans to eliminate trans fats in Disney's theme parks
  61. Starbucks cuts trans fats in half of U.S. stores




Much of the content on this page was obtained from the Wikipedia, which is licensed under the GNU Free Documentation License. Other information was obtained from the National Institutes of Health Pubmed.org online database.



* All information on Level1Diet.com is for educational purposes only. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease. Before changing your diet, or adding supplements to your diet, or beginning an exercise program, everyone should consult a qualified and licensed health practitioner; a physician, dietician or similar professional.



spacer spacer
spacer
Level1Diet.com foods to eat...
   


DO YOU KNOW ?
Over 1,532 new health studies are published every day ― 559,288 per year. Join our weekly update program to stay informed...
spacer

spacer
» About Health Updates


spacer

Donate a few dollars
to help us promote
anti-inflammatory health.


spacer
Bigger Font Size Smaller Font Size Left Align Justify Align Right Align Bookmark This Page
spacer
Search 3.1 Million
Health Studies


» List of 4,000+ Diseases
spacer
   

spacer




Subscribe to
Level1Diet.com
Health Reports


Add to Google Reader or Homepage
Subscribe in NewsGator Online
Subscribe in Bloglines
Add to Excite MIX
Add to netvibes
Add to fwicki
Add to My AOL
Add to The Free Dictionary


[Valid RSS]



About Us Contact Us Privacy Free Newsletter Health FAQs Terms of Use

 Subscribe in a reader

© 2010 Level1Diet.com, All Rights Reserved.     Contact:

Replace omega-6 vegetable oils with omega-9 olive oil... Eat oily fish like tuna, sardines, anchovy, salmon, herring... Beans, lentils, peas add fiber... Nine or more 3-ounce servings of fruits or vegetables per day...