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“However, trials of at least 12 months’ duration show that compliance with energy restriction is the main determinant of sustained weight loss, with no clear merit of LCHF diets over diets of different macronutrient composition.” (see)
This sentence references an article from 2009: “Comparison of Weight-Loss Diets with Different Compositions of Fat, Protein, and Carbohydrates“. In that study the authors compared 4 diets, with the following macronutrient distributions after 2 years:
|Diet 1||Diet 2||Diet 3||Diet 4|
Can you find any LCHF diet in the table above? No, you can’t, because all those diets are high in carbs (42-53%) and low in fat (26-35%). They are not even close to a true LCHF diet, where carbs are in the 10-26% range. Double the percentage of fat on those diets and you are near of a LCHF diet.
How can you say anything about the merits of a LCHF diet, if no LCHF diet was used in that study? This lie fits into the typical straw-man fallacy category.
The first signer of the letter is Jim Mann.