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Jul 16

Atkins diet – Wikipedia, the free encyclopedia

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Atkins diet, also known as Atkins nutritional approach, is a low-carbohydrate diet promoted by Robert Atkins from a research paper he read in The Journal of the American Medical Association. The paper entitled "Weight Reduction" was published by Alfred W. Pennington in 1958.[1] The Atkins diet leads to 0.1% to 2.9% more weight loss at one year than a control group.[2]

Atkins used the study to resolve his own overweight condition. He later popularized the method in a series of books, starting with Dr. Atkins' Diet Revolution in 1972. In his second book, Dr. Atkins' New Diet Revolution (2002), he modified parts of the diet but did not alter the original concepts.

The New Atkins for a New You (2010) is based upon a broad array of information gained over the last decade not covered in previous editions, including nutrient-rich foods. The New Atkins for a New You Cookbook was released in 2011 by Colette Heimowitz to provide dieters with simple, low-carb recipes.

The Atkins diet leads to 0.1% to 2.9% more weight loss at one year than a control group.[2]

Because of substantial controversy regarding the Atkins diet and even disagreements in interpreting the results of specific studies it is difficult to objectively summarize the research in a way that reflects scientific consensus.[3][4] Although there has been some research done throughout the twentieth century,[5][6] most directly relevant scientific studies, both those that directly analyze the Atkins Diet and those that analyze similar diets, have occurred in the 1990s and early 2000s and, as such, are relatively new. Researchers and other experts have published articles and studies that run the gamut from promoting the safety and efficacy of the diet,[7][8] to questioning its long-term validity,[9][10] to outright condemning it as dangerous.[11][12] A significant early criticism of the Atkins Diet was that there were no studies that evaluated the effects of Atkins beyond a few months. However, studies began emerging in the mid-to-late-2000s which evaluate low-carbohydrate diets over much longer periods, controlled studies as long as two years and survey studies as long as two decades.[7][13][14][15]

In addition to research on the efficacy of Atkins and other low-carbohydrate diets, some research has directly addressed other areas of health affected by low-carbohydrate diets. For example, contrary to popular belief that low-carbohydrate diets damage the heart, one study found that women eating low-carbohydrate, high-fat/protein diets had the same or slightly less risk of coronary heart disease, compared to women eating high-carbohydrate, low-fat diets.[16] Other studies have found possible benefits to individuals with type 2 diabetes,[17] cancer,[18][19] and epilepsy.[20][21] One study comparing two levels of low-carbohydrate diets (ketogenicthe lowest carbohydrate leveland non-ketogenic) found that both had positive effects in terms of insulin sensitivity, weight loss, and fat loss while the ketogenic diet showed slightly higher risks of inflammation and somewhat lower perceived levels of vigor, described as "potentially harmful metabolic and emotional side-effects" (although it should be noted that one of the researchers of this study, Barry Sears, markets The Zone as a competing low-carbohydrate diet).[22]

The effects of the Atkins Diet remain a subject of much debate. Some studies conclude that the Atkins diet helps prevent cardiovascular disease, lowers the low density lipoprotein (LDL) cholesterol, and increases the amount of HDL, or so-called "good" cholesterol. Some studies suggest that the diet could contribute to osteoporosis and kidney stones.[23]

According to Harper (2004) in a year-long study, the concentration of high-density lipoprotein, (HDL) cholesterol increased, and insulin resistance improved much more in dieters following the Atkins Diet than in those following a low-fat, calorie restricted diet. Harper also mentions that there had not been enough prior research to allow him to confidently say that Atkins is safe to be recommended to patients.[24][25]

A 2005 study by Beisswenger and colleagues compared levels of the glycotoxin methylglyoxal (MG) before and after starting the Atkins Diet. MG is associated with blood vessel and tissue damage, and is higher in people with poorly controlled diabetes. The study found that MG levels doubled shortly after the diet was started, noting that the MG rise was related to the presence of ketosis. A rise in acetol and acetone was found, indicating that MG was produced by oxidation. MG also arose as a by-product of triglyceride breakdown and from lipoxidation (ketosis related to fat intake).[26]

Whether or not increased methylglyoxal is harmful to human beings has been questioned by the Indian Association for the Cultivation of Science, who in a 2008 critical overview of various studies (including Beisswenger's study) state, "The authors present a brief critical overview of studies indicating both toxic and beneficial effects of methylglyoxal and suggest that the beneficial effects of methylglyoxal outweigh its toxic effects". While not drawing any definite conclusions, the Indian Association for the Cultivation of Science recommends further study especially in the area of using methylglyoxal to cure or treat cancer.[27]

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Atkins diet - Wikipedia, the free encyclopedia

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