Will I lose muscle if I practice Intermittent Fasting long-term?

As in all forms of dietary restriction that lead to weight loss, intermittent fasting may cause both fat and lean mass loss over time. However, there is some evidence that losing weight through IF may lead to less muscle loss as compared to fat loss than traditional dieting or caloric restriction. While traditional dieting without exercise typically leads to body mass loss that is 75% fat, 25% muscle, IF may lead to either an equivalent or smaller percentage of muscle loss, or as little as 10%. However, you will always lose some percentage of muscle when you lose weight. Regular exercise, especially weight-bearing or resistance training, can alleviate muscle loss during IF regimens that lead to weight loss.