Protein is essential for maintaining muscle mass as we age. Modulating protein intake via dietary intake or fasting can have variable effects on aging and muscle growth. Whereas fasting turns off multiple pathways associated with aging, such as mTOR, IGF-1, growth hormone, and others, eating for optimal fitness activates these important processes.    This Aliquot features Drs. Guido Kroemer, Dominic D'Agostino, Valter Longo, Peter Attia, and Rhonda Patrick.  Get more Aliquots! Become a FMF Premium member and get full access to our members-only podcast, The Aliquot, plus live Q&As with Rhonda, biweekly Science Digest emails, and more. Learn more and sign up at: https://www.foundmyfitness.com/aliquot