Body composition changes following different types of bariatric surgery: Interpreting discordant findings from different methodological approaches

Is Weight Loss–Induced Muscle Mass Loss Clinically Relevant?

“…There is an inverse relationship between initial body fat mass and the proportion of weight loss from FFM, which could explain why men, who generally have less body fat (and more FFM or SMM) than women, usually have a greater proportion of weight loss from FFM and SMM than women. The proportion of weight loss from FFM is directly associated with total weight loss, but the influence of this effect is attenuated in people with obesity and the proportion of weight loss from FFM is similar across a wide range (5%-35%) of weight loss . The decrease in FFM is primarily responsible for the decrease in basal metabolic rate that occurs after weight loss.…”