In this "Ask Me Anything" (AMA) episode, Peter answers a wide range of questions from subscribers. Bob Kaplan, Peter's head of research, asks the questions. If you're not a subscriber and listening on a podcast player, you'll only be able to hear a preview of the AMA. If you're a subscriber, you can now listen to this full episode on your private RSS feed. You can also listen to this full episode on our website at the AMA #10 show notes page. We discuss:

• Does testosterone supplementation impact longevity? [2:40];
• Under what conditions does Peter decide to treat patients who have low testosterone? [8:50];
• Are there risks involved with testosterone replacement therapy? [17:10];
• How does Peter diagnose and treat hypothyroidism? [21:30];
• How might someone do time-restricted feeding while also adding muscle mass? [26:30];
• If building muscle requires higher levels of IGF-1, should we be concerned about longevity? [34:45];
• How to preserve muscle mass while fasting [41:45];
• Is it possible to simultaneously lose fat and add muscle mass? [46:30]; and
• More.

Learn more: https://peterattiamd.com/ Show notes page for this episode: https://peterattiamd.com/ama10 Subscribe to receive exclusive subscriber-only content: https://peterattiamd.com/subscribe/ Sign up to receive Peter's email newsletter: https://peterattiamd.com/newsletter/ Connect with Peter on Facebook | Twitter | Instagram.