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. Although there has been some research done throughout the twentieth century, 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, to questioning its long-term validity, to outright condemning it as dangerous. 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. 5-р АНГИ
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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. Other studies have found possible benefits to individuals with type 2 diabetes cancer, and epilepsy. One study comparing two levels of low-carbohydrate diets (ketogenic—the lowest carbohydrate level—and 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)
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