Peptides are everywhere in health and fitness discussions, but as Dr. Andrew Huberman explained on the Flagrant podcast, “Peptides just means a chain of amino acids. You need to sleep, exercise, good nutrition, good social interactions. ”
“You’re never going to optimize testosterone, muscle, fat loss, etc., if you’re not doing those things. Then there’s a question of supplementation, and there are some good supplements that are legal, things like Tongkat ali, Fadogia agrestis, they can boost testosterone somewhat and don’t shut down your own testosterone production or growth hormone production. “
Huberman describes peptides as “a new kind of wedge in between supplements and prescriptions. The ones most popular right now in health and fitness stimulate growth hormone release. They’re called secretagogues — things like Sermorelin, Tesamorelin, Ipamorelin.”
They are typically taken as injections before sleep if you haven’t eaten for a couple of hours. They stimulate growth hormone, IGF-1, aid recovery, fat loss, muscle repair, and libido. Sermorelin in particular “will not disrupt fertility” and this separates it from TRT.
Huberman is open about taking it:
“I take Sermorelin three to five nights a week. It helps me get into deep sleep quickly, gives an IGF-1 boost, and speeds recovery. I never recovered quickly from exercise until I started using it at 45.”
For tissue repair, Huberman highlights BPC-157. “It promotes healing of tissues. I had an L5 compression and was in pain standing up. Two injections of BPC157—gone.” He notes these peptides “aren’t going to shut down fertility or testosterone production.” Other peptides like TB500 have less research and are taken with caution.
“A lot of the bodies you see in Hollywood films are on peptides. They’re a middle ground where you’re not risking long-term fertility issues. They’re milder than ster*ids and don’t cause androgenic effects in women. They’re banned in sports for a reason.”
On testosterone replacement therapy, Huberman warns:
“I’m hearing about guys going on TRT really young. It will shut down sperm production unless you take HCG. The best practice now is smaller doses every third or fourth day along with HCG.”
He emphasizes lifestyle first: train on your own hormones, prioritize sleep, nutrition, habits, and life balance before considering TRT.
In short, peptides like Sermorelin, Tesamorelin, BPC-157, and TB500 sit between supplements and pharmaceuticals. They offer potential for recovery, repair, and hormone optimization, but careful sourcing, moderation, and lifestyle focus remain essential. Peptides are tools, not magic solutions.
