Peptides
Sermorelin: growth-hormone release versus fitness claims
How does it work?
Sermorelin is growth-hormone-releasing hormone fragment 1–29. It stimulates pituitary GHRH receptors to increase endogenous growth-hormone secretion. A change in hormone concentration is a biological marker, not proof of better strength, body composition, sleep, or lifespan. [1]
What do studies show?
In normal male volunteers, subcutaneous GHRH(1–29) produced a measurable growth-hormone response. The study was short and examined hormones, not long-term fitness outcomes. Sermorelin previously had a prescription product for pediatric growth-hormone deficiency and diagnostic use, but that history does not validate a supplier research vial for adult optimization. [1,2]
Safety
Growth-hormone signaling can affect glucose handling and fluid balance, and an individual’s health conditions may change risk. The quality and sterility of a catalog vial are separate questions from the pharmacology of the studied peptide.
DOSE STATUS
How much?
EVIDENCE CONTEXT
Why?
The cited evidence does not establish a dose for this use or product.
A study used a single 3 mcg/kg subcutaneous GHRH(1–29) challenge to measure hormone response, not a daily fitness regimen. Jay Campbell describes an anecdotal 100–150 mcg subcutaneous bedtime starting range for men and higher practice ranges. Those figures are his advice, not established safe/effective adult fitness doses, and should not be read as a conversion from the experimental challenge. [1,3]