Your Muscles Become More Resistant to Protein as You Age Research suggests older adults can build ~40% less new muscle protein from the same protein stimulus as younger adults. This is called anabolic resistance. And the interesting part is that it doesn’t seem to be caused by one thing. Aging affects several systems simultaneously—including how amino acids reach the muscle and how strongly muscle responds to leucine and mTOR signaling. So the answer isn’t simply: “Eat more protein.” Or: “Take more leucine.” There’s a smarter way to approach it. And importantly, anabolic resistance isn’t something you should wait until your 70s to think about. The work you do in your 40s and 50s can dramatically change the amount of muscle and strength you carry into later life. In our Ketogains Bootcamp starting September 7, I’ll teach you the strategies we use to help mitigate anabolic resistance, preserve muscle, improve body composition, and extend your Strengthspan. You don’t just want...