The FDA History Most People Don’t Know
Sermorelin holds an unusual distinction in the peptide world: it was actually FDA-approved.
In 1997, the FDA approved Sermorelin acetate under the brand name Geref for two indications — diagnosing growth hormone deficiency in children, and treating growth hormone deficiency in children with idiopathic short stature. It was manufactured and sold commercially until 2008, when the manufacturer (Serono) discontinued it — not for safety reasons, but because synthetic human growth hormone (somatropin) had become the preferred commercial product.
This history matters because it means Sermorelin has been through the rigorous FDA drug approval process. Its pharmacology is well-characterized. Its safety profile in humans has been studied to a standard that very few other peptides in the longevity space can claim. When physicians prescribe Sermorelin today through compounding pharmacies, they are working with a compound that has a genuine clinical record — not just animal data.
How Sermorelin Works
Sermorelin is a synthetic version of the first 29 amino acids of Growth Hormone Releasing Hormone (GHRH) — the signal your hypothalamus sends to the pituitary gland to trigger growth hormone release. The full GHRH molecule has 44 amino acids; Sermorelin’s 29-amino-acid truncated form retains full biological activity while being more practical to synthesize.
When Sermorelin is administered, it binds to GHRH receptors in the pituitary gland and triggers GH release — the same mechanism your body uses naturally. This is an important distinction from synthetic GH (somatropin): Sermorelin works with your body’s existing feedback systems. Your hypothalamus can still send somatostatin (the “stop releasing GH” signal) in response to Sermorelin, which means GH release remains regulated and pulsatile rather than being overridden by an external dose.
Why This Regulatory Mechanism Matters
Exogenous GH (injecting synthetic human growth hormone directly) delivers a fixed, pharmacological dose that bypasses the body’s normal feedback systems. This is effective but carries risks associated with supraphysiological GH levels — including fluid retention, joint pain, and at high doses, concerns about long-term effects.
Sermorelin stimulates your own pituitary to produce GH in a more physiological, regulated pattern. The body maintains control over how much GH is ultimately released, which is why many physicians and researchers consider GHRH analogs like Sermorelin a more conservative and physiologically appropriate approach to GH optimization than direct GH administration.
Sermorelin Today
Sermorelin is currently available through licensed 503A compounding pharmacies with a physician prescription. It is one of the most commonly prescribed peptides in anti-aging and longevity medicine in the US. My Body Labs includes Sermorelin in both the Recovery and Longevity protocols.