Sermorelin - Generic Peptides

Buy Sermorelin by Generic Peptides at XSteroids, sold as 2 mg, 5 mg and 10 mg vials. Chemically it is a GHRH fragment, a 29 amino acid slice of the natural growth hormone releasing hormone, and its job is to prompt the pituitary into releasing the body's own growth hormone. The brand's product is a lyophilized vial; below you will read where the molecule comes from, why a half-life measured in minutes still leaves a measurable effect, the dilution sums for each fill size, the pairing question, and its regulatory and sporting position.

What is sold here is laboratory material. Sermorelin did once exist as a prescription medicine, but that product left the market years ago, and none of the following text is medical advice.

What Sermorelin Is and What You Are Buying

Sermorelin acetate is the acetate salt of GHRH(1-29), also written GRF 1-29, a 29 amino acid polypeptide and the shortest fully functional fragment of human growth hormone releasing hormone. Its formula is C149H246N44O42S, and it was sold under the names Geref and Gerel with the ATC codes H01AC04 and V04CD03.

Generic Peptides lists three vial sizes: 2 mg, 5 mg and 10 mg of lyophilized powder. In clinical settings the same molecule was given intravenously as a diagnostic test and subcutaneously for treatment, which is a useful reminder that the vial concentration is a laboratory question rather than a prescription.

Inside the pack there is a single glass vial of sterile lyophilized sermorelin acetate, chosen as 2 mg, 5 mg or 10 mg. Nothing else comes with it: syringes, swabs and bacteriostatic water are separate purchases, and the reason the product travels as a dry cake is that powder outlasts any solution. That cake is off-white and dissolves to clarity.

Sermorelin Mechanism and Pituitary Feedback

Receptor and feedback

Sermorelin binds the GHRH receptor and mimics the full length hormone, stimulating growth hormone secretion by the pituitary. Because the axis keeps its own feedback through somatostatin, output stays pulsatile and follows natural rhythms rather than sitting flat the way an injected hormone does. That feedback also makes an overdose difficult compared with recombinant growth hormone.

Why a tiny half-life still produces an effect

Published pharmacokinetics for the parent compound GHRH(1-29)-amide gave a half-life of about 6.2 minutes after intravenous dosing in rats, and vendor references for sermorelin quote around 10 to 20 minutes. The peptide disappears within minutes, yet it still does its work, because the readout is a burst of growth hormone captured in the day's growth hormone and IGF-1 profile, not the survival time of the molecule itself.

Where sermorelin sits in the family

Sermorelin is a GHRH receptor agonist, so it sits on the opposite side of the pituitary from the ghrelin type peptides. It primes the gland and lets it release growth hormone in the body's own pulsatile pattern, whereas hexarelin and ipamorelin trigger the pulse through the ghrelin receptor. The two mechanisms are additive rather than competing, which is why a GHRH fragment and a secretagogue are usually written up as a pair, and why sermorelin is never described as replacing growth hormone itself.

What to Expect With Sermorelin

What the clinical record shows

Sermorelin has real clinical history. As an intravenous test it was given at about 1 microgram per kilogram to check pituitary reserve, and as a treatment it was injected under the skin at 100 to 500 micrograms a day, with children dosed around 30 micrograms per kilogram [3]. A 1997 study of a closely related GHRH fragment used 10 micrograms per kilogram subcutaneously for sixteen weeks and recorded an increase in growth velocity [4], which is the kind of outcome data most peptides in this catalog simply do not have.

The half-life contradiction

Published figures for the half-life do not agree. The pharmacokinetic work on GHRH(1-29) amide measured roughly 6.2 minutes after intravenous dosing in the rat [2], while vendor references for sermorelin quote about 10 to 20 minutes in humans. Nobody has published a clean human pharmacokinetic study of sermorelin, so both numbers should be read as estimates. What they agree on is the practical consequence: the peptide is gone in minutes, and the effect is read in the growth hormone and IGF-1 that follow.

What else to expect

The approved prescription product was withdrawn from the market in 2008 for commercial reasons rather than safety [1], and there is no long term safety data for a healthy adult using a research vial. Tachyphylaxis, a falling response with continued use, is described for the class, and the markers to watch are growth hormone and IGF-1. What should not be expected is a change in body weight or one dramatic reading: the effect of a GHRH fragment is a modest, pulsed release of the body's own hormone.

Sermorelin Doses and Reconstitution

Dilution Sums for the Three Sermorelin Vials

The sums are simple once the volume for each fill size is fixed. A 2 mg vial plus 1 ml of bacteriostatic water gives 2 mg per ml and 200 mcg in every 0.1 ml. A 5 mg vial takes 2 ml, which works out at 2.5 mg per ml and 250 mcg per 0.1 ml. A 10 mg vial takes 2.5 ml for 4 mg per ml and 400 mcg per 0.1 ml. Read against a U-100 insulin syringe, each 0.1 ml of solution shows as 10 units. Swirl the vial, never shake it, and keep it cold.

How Many Days One Sermorelin Vial Covers

Supplier write-ups describe 200 to 500 mcg once a day, ideally 30 to 60 minutes before sleep on an empty stomach, in cycles of 12 to 16 weeks followed by a break of four to six weeks. At 250 mcg a day the 2 mg vial lasts about eight days, the 5 mg vial about 20 days and the 10 mg vial about 40 days. Clinical numbers run differently: the diagnostic test used about 1 mcg per kg by vein, while children received roughly 30 mcg per kg under the skin each night. The two sets of numbers are not interchangeable.

Stacking Sermorelin With a Secretagogue

Sermorelin is a GHRH analogue, so its natural partners are the secretagogues that trigger release from the other side. Ipamorelin 5 mg is the selective ghrelin receptor agonist used for that purpose, and Hexarelin is the more potent but less selective alternative. CJC-1295 DAC does the same GHRH job with a much longer action, while Tesamorelin is the analogue with human randomised data behind it. Where the goal is a fixed amount of hormone rather than a pituitary response, Somatropin is the direct route.

Recovery Notes for a Sermorelin Block

Because sermorelin works through the pituitary and keeps the natural feedback loop intact, it does not shut down the androgen axis and no post-cycle therapy follows a peptide block. The peptide leaves the body within minutes, so the break between blocks is about preventing desensitisation at the pituitary rather than waiting for clearance. Athletes who run an androgen cycle at the same time deal with recovery on the anabolic side, and this catalog holds nothing of that kind.

Sermorelin Side Effects and Warnings

What trials and reviews describe

Reviews of approved peptides point to subcutaneous injection and injection site reactions as the main nuisance. A 2026 review of unregulated growth hormone peptides lists fluid retention, muscle and joint aches, changes in glucose handling and shifts in prolactin or cortisol as class level concerns for this family.

Safety considerations

None of this is medical advice; the vial is research material. A pituitary disorder, active cancer or diabetes are each a reason to leave it alone unless a clinician is directing the work, the vial has to be kept where children cannot reach it, and any solution showing cloudiness or particles belongs in the waste bin.

Cold Storage for Sermorelin

Untouched vials stay at 2 to 8 C away from light, and the freezer is only for stock that will sit for months. Once mixed, keep the solution cold between 2 and 8 C and finish the vial inside 28 to 30 days; a reconstituted vial never goes back into the freezer.

Why Buy Sermorelin Peptide from XSteroids?

Buying at XSteroids means buying from the Generic Peptides brand catalog itself, with the payment page protected and every parcel tracked. Customers in the US are served in 3 to 6 days and customers outside it in 12 to 26 days. All three vials, 2 mg, 5 mg and 10 mg, appear on this page, and the cards below collect the secretagogues and the long acting GHRH analogues that a GHRH fragment is normally researched alongside.