PEP/NEWS — Peptide intel. Daily.

🌱 Join The Dr. Z Newsletter: https://bit.ly/39UM0mi Things You Should NEVER Do While Taking Apple Cider Vinegar is a video that that looks at the details as to why people say apple cider vinegar is dangerous. There are no doubt reasons on

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In this video, Dr. Rena Malik explores what the research really says about women and pornography, why more women are watching porn than many people realize, and how their reasons for watching can influence sexual health, confidence, and rel

Lifespan.io's monthly digest covers July's longevity research wins alongside a serious adverse event that has the field talking about safety and oversight.

Peter Attia's AMA #86 digs into new data on GLP-1 receptor agonists — the semaglutide and tirzepatide drug class — and how much lean muscle patients actually lose. The answer, he argues, depends heavily on protein intake and resistance training.

A Nature Aging study finds that chemotherapy causes cancer cells to become senescent — and those senescent cells then secrete signals that help tumors spread. The finding raises pointed questions about senolytic timing in oncology contexts.

Planned, structured exercise — not just staying generally active — protects against specific muscle aging markers. The study draws a meaningful line between casual movement and deliberate training for anyone serious about muscle longevity.

Bryan Johnson details the full stack he uses to maintain a head of hair thicker than he had in his 20s — including nutrition, topicals, and scalp interventions. Worth parsing for the evidence-backed pieces, which are real.

Using a device that measures eight skin markers via multispectral imaging, Kate Tolo tracked her skin age reversal to an apparent biological age of 21. The protocol breakdown is unusually detailed and measurement-driven.

Researchers in Aging Cell found that neutrophil extracellular traps — immune structures released during inflammation — significantly worsen UVB-induced skin damage. Inhibiting them reduced photoaging injury in mouse models, opening a new target for skin protection research.

Jim Otvos, Ph.D. joins Peter Attia to explain how NMR (nuclear magnetic resonance) blood analysis gives a far richer picture than standard lipid panels. A single scan can surface insulin resistance, cardiovascular risk, inflammation load, and mortality signal simultaneously.

Activating GPR81 — a receptor that senses lactate, the byproduct of hard exercise — reduced key signs of cellular aging and improved muscle performance in progeroid (accelerated-aging) cell models. The finding links exercise biochemistry directly to senescence suppression.

Part two of Research Vials' cancer biology series covers how tumors spread and which peptides are being studied against key metastatic pathways. Essential background for anyone following peptide-oncology research.