In Basal Metabolic Rate: What does "Fast Metabolism" mean? [Archive] - Bodybuilding.com Forums

What does "Fast Metabolism" mean? [Archive] - Bodybuilding.com Forums We've all known people that can eat anything and never gain weight and when asked, they say "I just have a fast metabolism". But what does that mean? Is their body inefficient at absorbing calories, or is their lean muscle mass burning more calories than normal, or is it something else? If their body is metabolizing calories at ...Basal Metabolic Rate