Research & Guides · Longevity

Longevity, written by clinicians.

25 physician-reviewed articles on longevity — what each compound does at the cellular level, who it's for, and what the evidence does and doesn't establish.

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9 Min

Updated

2026

Amber glass vial on a clean white surface — glutathione's measurable changes are biochemical, not photographic

Featured · Longevity

Glutathione Before and After: What Actually Changes, and What Does Not

Most glutathione before-and-after pages are skin-lightening galleries. That is the use with the thinnest evidence and the clearest safety warnings. Here is what a physician would tell you actually changes — and why it is not something a camera can capture.

Dr. Richard Dentico, MD · 11 min read

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Swimmer gliding through a lane seen from above

Longevity · 12 min read

Sermorelin Benefits: What the Evidence Supports, Graded Honestly

Most "sermorelin benefits" pages are a bulleted wish list. This one grades each claimed benefit by the strength of the evidence behind it, answers the cancer question directly, and explains why the molecule's ceiling is your own pituitary.

Man resting in bed in soft morning light

Longevity · 11 min read

Sermorelin Before and After: The Realistic Timeline, Month by Month

Every sermorelin before-and-after page on the internet has a timeline table and a stock photo of someone at the gym. Here is the version a physician would sign: what changes, in what order, over how long — and the limitations named before the claims.

The real reasons behind waking up at 3am every night

Longevity · 7 min read

Why Do I Wake Up at 3AM? The Real Reasons (and How to Fix It)

Why do I wake up at 3am? Waking up at 3am almost every night usually isn't random — it's most often stress on top of your cortisol rhythm, alcohol, a warm room, or lighter sleep with age. A physician-reviewed look at the real causes and what actually helps.