Rhonda Patrick· PhD
I do think it's important to understand, like, certain measures, underwater weighing, like, a lot of the measures that you'll see, DEXA, underwater weighing, BIA, bioelectrical impedance analysis. They are looking at not necessarily muscle mass, although there are ways to try to derive that, but when they talk about fat-free mass and lean mass, generally, depending on the measure, they're combinations of in the very least muscle and water.