Studies On Health Effects
Because of the substantial controversy regarding low-carbohydrate diets 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 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 these diets to questioning their long-term validity to outright condemning them as dangerous. A significant criticism of the diet trend was that there were no studies that evaluated the effects of the diets beyond a few months. However, studies emerged which evaluate these diets over much longer periods, controlled studies as long as two years and survey studies as long as two decades.
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—Plato (c. 427–347 B.C.)
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—David Hume (1711–1776)