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Biohack-it

Why Is Your Ponytail Thinner? | Dr. Vali

Oct 15, 2026 · 46m

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About this episode

Dr. Vali is a double board certified doctor who runs one of London’s top longevity clinics, based inside Selfridges, with twenty five years of clinical practice behind her. On this episode of Biohack-it, Iman Hasan gets her to start at the absolute beginning: what peptides actually are, why almost all of them sit in a grey market with no regulation anywhere in the world, and what is really in the vial when you buy one online. Then it gets specific. Dr. Vali explains which peptides she uses for nervous system dysregulation, which for muscle mass and longevity, and which one she flatly refuses to dispense to anyone, even though it is the most viral peptide on TikTok right now. She explains…