Carbohydrates restriction make the body to burn amino acids for fuel instead of to build muscle

This is a review and the access of the full article is very limited, we will try to access the studies this review evaluate and add them to this claim.

The claim "instead of to build muscle" overstates the evidence. The study shows amino acids are used MORE for fuel, requiring higher protein intake to maintain synthesis - not that muscle building stops entirely. Result: The claim partially overstates the evidence. If used as a supporting paper, this needs careful framing - the paper supports that low-CHO increases amino acid oxidation, but doesn't support that muscle building is completely replaced by amino acid burning.

This study of 11 young men found that exercising with low glycogen—from carb restriction—increased breakdown of amino acids (leucine, isoleucine, valine) for fuel rather than muscle building. Blood markers confirmed increased muscle protein breakdown with low glycogen. Well-designed but limited by male-only sample and single exercise bout. Limitations: Cannot determine if metabolic changes translate to clinically meaningful differences in muscle growth or athletic performance.