I wondered about exactly this. The study is actually a published letter [1], and it doesn't appear to account for this. Science Direct even published a study a

I wondered about exactly this. The study is actually a published letter [1], and it doesn't appear to account for this. Science Direct even published a study about this in 2017 [2]: > Weight loss, achieved through a calorie-reduced diet, decreases both fat and fat-free (or lean body) mass. In persons with normal weight, the contribution of fat-free mass loss often exceeds 35% of total weight loss, and weight regain promotes relatively more fat gain. We already know how to reduce the effect of this, the person simply needs to increase exercise as the weight is lost in order to maintain lean muscle mass. [1] https://www.sciencedirect.com/science/article/pii/S2452302X24002869 https://www.sciencedirect.com/science/article/pii/S2452302X2... [2] https://www.sciencedirect.com/science/article/pii/S2161831322006810 https://www.sciencedirect.com/science/article/pii/S216183132...