What's worth trying—and why

Peptides, biomarkers, and real experiments. The studies, numbers, and firsthand results behind your next health decision.

TB-500: The Heart-Repair Protein Behind the Peptide

Sep 30, 2026

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6 min read

TB-500: The Heart-Repair Protein Behind the Peptide

A repair protein reduced damaged heart tissue by 43% in a rat experiment. TB-500 comes from a short section of that protein. Following the evidence reveals why the distinction matters.

KPV: Three Amino Acids Against Gut and Skin Inflammation

Sep 28, 2026

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9 min read

KPV: Three Amino Acids Against Gut and Skin Inflammation

KPV reduced gut inflammation in mice and inflammatory injury in skin models. Its tiny size gives it a useful route into cells, and oral delivery adds another piece to the story.

GHK-Cu: The Copper Peptide That Tells Skin to Rebuild

Sep 24, 2026

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6 min read

GHK-Cu: The Copper Peptide That Tells Skin to Rebuild

A rat experiment produced 3.44 times as much collagen in treated wound tissue. The biology behind that result helps explain why this tiny peptide belongs in the skin-care conversation.

Semaglutide: The Weight-Loss Drug That Protects the Heart

Sep 23, 2026

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4 min read

Semaglutide: The Weight-Loss Drug That Protects the Heart

In a trial of 17,604 people with cardiovascular disease and excess weight, semaglutide cut the combined risk of cardiovascular death, heart attack or stroke by 20%. None had diabetes. How did an appetite drug get here?

Why I Stare Into a Red Light Panel Every Day

Sep 20, 2026

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5 min read

Why I Stare Into a Red Light Panel Every Day

My morning cortisol was 0.49, below the bottom of the range. By October it was 3.9. Only one of my three reasons is about looking younger.