800: The "Exhausted" Fibroblast: Reversing Skin Aging & Modulating mTOR with Dr. Rahul Mehta

from Beauty Bytes with Dr. Kay: Secrets of a Plastic Surgeon™

In this paradigm-shifting episode of Beauty Bytes, I sit down with Dr. Rahul Mehta, the co-founder of Rapalogix Health and former head of R&D at SkinMedica. We dive deep into the future of cellular longevity and why the "do more, laser more, peel more" approach might actually be exhausting your fibroblasts.Dr. Mehta explains the science behind mTOR, the master regulator of our cell cycle, and how constantly keeping it in "growth mode" prevents our skin from repairing itself. We discuss his breakthrough molecule, RLX-201 (Re-!), which inhibits TORC1 to trigger repair pathways without the side effects of systemic rapamycin.We also cover the fascinating data showing how this technology made 56-year-old fibroblasts morphologically resemble 23-year-old cells, effectively reversing cellular aging rather than just masking it.

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This episode is 53 minutes long.

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This episode was published on January 28, 2026.

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