Intermittent fasting helps people of all ages lose weight, but it also causes significant muscle loss in older adults and unexpectedly raises bad LDL cholesterol

LDL-C increases during weight loss of any kind are a well-known phenomenon, which appears to be related to the fact dat is actually being used for energy. This tends to stabilize and often ends up dropping compared to baseline once weight does. And loss of muscle mass is also a well-known side effect of caloric restriction if not paired with muscle-building exercise.