PEP/NEWS — Peptide intel. Daily.

🎯 Dr. Durst sits down with integrative oncologist and breast surgeon Dr. Jen Simmons @dr.jennsimmons for one of the most eye-opening conversations you'll hear about breast cancer — from a doctor who lived it herself. Dr. Simmons grew up wa

In this episode, a wide range of sexual health questions are addressed, including the effects of cranberries on semen, the reality of multiple orgasms, the benefits of Tongkat Ali, and managing signs of prostate enlargement. The discussion

Bryan Johnson outlines the four cardiovascular protocols behind blood pressure scores lower than 90% of 18-year-olds. The post is light on mechanisms but anchored in measurable outcomes.

Sustained overexpression of HIF-1α (a protein that responds to low oxygen) triggers blood vessel growth inside cartilage — and destroys it. The finding points to a new therapeutic target for joint degeneration.

Researchers used network biology to scan existing approved drugs for activity across multiple aging hallmarks at once. Several repurposable compounds emerged — a cheaper path than de novo drug discovery.

A Nature Aging analysis argues epigenetic clocks measure gradual drift in gene regulation — not a fixed program. That framing matters for how researchers interpret clock-reversal experiments with peptides and senolytics.

Peter Attia reviews the clinical literature on growth hormone for adult tissue repair and finds the mechanism is sound but the outcomes are underwhelming. The piece is a useful counterweight to GH-secretagogue enthusiasm.

An Aging Cell study shows antioxidants can selectively remove senescent muscle cells by altering mTOR signaling — the pathway cells use to sense nutrients. It suggests a non-peptide route to partial senolytic effects in skeletal muscle.

A meta-analysis covering 17 tissue types confirms that DNA methylation clocks track biological age consistently across the body. Researchers call this the largest cross-tissue validation of epigenetic aging signatures to date.

Nature Aging mapped how circulating metabolites at midlife connect genes, gut microbiome, and environment to long-term brain health. Several metabolite clusters associated with cognitive decline appear modifiable by lifestyle.

Researchers used PET scanning to show that sleep deprivation raises levels of SV2A (a marker of synaptic density) in the human brain. The finding supports the synaptic homeostasis hypothesis — that sleep is when the brain prunes overloaded connections.

The first installment of Research Vials' cancer biology series covers the foundational pathways tumors exploit — essential reading before diving into peptide-specific oncology research. Covers cell cycle dysregulation, apoptosis resistance, and signaling crosstalk.

A curated rundown of human interventions with published evidence for reducing epigenetic age. Includes lifestyle, pharmacological, and peptide-adjacent approaches — useful as a comparative reference for researchers designing protocols.

RNA-DNA hybrids escaping into the cytoplasm of senescent cells trigger inflammatory signaling. The discovery adds a new mechanism to the well-known SASP (senescence-associated secretory phenotype) story.