Fasting-mimicking diets can temporarily decrease muscle mass, which is rebuilt during refeeding.

“And so, now, in clinically, we see a specific loss of fat only significant in the visceral area, and then, no loss, or very minimal loss of lean body mass, right?”

“But the muscle is also decreased. But then, when you refeed, the muscle is rebuilt. I mean, we have evidence for regeneration in mice, we don't know yet in humans. But certainly the people go back to their normal muscle mass.”