BIOHACKPHARMStack Analyzer

Sermorelin

Sermorelin acetate, Geref, GRF 1-29, GHRH (1-29)

Growth hormone & secretagoguesPrescription onlyWADA S2 · prohibitedEvidence: approved medicine

Synthetic copy of the first 29 amino acids of natural GHRH. Short-acting; makes the pituitary release its own GH in pulses.

Legal status: Brand product discontinued; prescription-only where available. Status varies by country.

What it gives

What people use it for and what the sources report. Strength is a general category from the literature: mild, clear or strong.

Purpose

Medical: was FDA-approved (Geref) to test pituitary GH reserve and treat GH deficiency in children; discontinued by the maker in 2008. Today it is used off-label, mainly for body composition and 'anti-aging'.

What people seek and what studies show

Used for body composition, recovery, sleep and 'anti-aging'. It increased growth rate in some children with GH deficiency. In a small trial of a close analogue in adults aged 55–71, GH, IGF-1 and skin thickness rose; men gained some lean mass, insulin sensitivity, well-being and libido, women did not, and sleep did not change. In older men it improved two of six strength tests without changing body composition.

Effects

Fat lossRecovery

Evidence: Approved medicine — studied in people for its medical use

Sought effects by goal (as reported)

Mass
Sought for: recovery
Cutting
Sought for: fat loss
Recomposition
Sought for: fat loss
Strength
Sought for: recovery
Endurance
Sought for: recovery, fat loss
Recovery & healing
Sought for: recovery

Possible side effects

Possible does not mean certain: whether they appear depends on dose, duration, individual response and monitoring. Below — what to watch for and how to notice it early.

7 possible side effects

level · how often it is reported
Elevated
Black-market quality risk (fakes, contamination)
The brand product is gone; the versions now in circulation vary in quality and sterility.
How to notice: Unexpected effects, pain or infection, a stronger or weaker effect than expected.
possible
Moderate
Abnormal tissue growth (theoretical cancer risk)
Raises IGF-1 while the body's feedback control stays intact; a theoretical concern with active or past cancer.
How to notice: No direct signs — the point is not to fuel existing growths.
rare
Low
Injection pain, infection, oil cough
Pain at the injection site and brief facial flushing were the most common effects in trials.
How to notice: Soreness, lumps; a short coughing fit right after an injection.
common
Low
Unknown long-term safety (little human data)
Studied mainly in children with GH deficiency; long-term use in healthy adults has not been studied.
How to notice: Nothing to notice — the risk is what is not yet known.
possible
Low
Water retention / bloating
GH-related fluid retention is possible but uncommon.
How to notice: Puffy face and ankles, softer look, quick weight jumps.
rare
Low
Numbness, tingling, carpal tunnel
GH-related fluid retention can occasionally press on nerves (tingling, numb fingers), as with GH itself; poorly studied for sermorelin.
How to notice: Numb or tingling fingers, especially at night.
rare
Low
Insulin resistance / higher blood sugar
A small GH-related rise in blood sugar is possible.
How to notice: Thirst, more hunger, energy crashes after carbs.
rare

What the levels mean

Lowbackground — just be aware
Moderatewatch for signs
Elevatedneeds regular control
Highcritical — can be life-threatening or permanent

Level: general category from the literature, not your personal risk

How often

common
reported often
possible
reported in some people
rare
reported occasionally

How to lower the risks

For 3 of 7 possible side effects there are specific ways to lower the chance: everyday measures, supplements and options a doctor may consider. For the rest — general advice. No measure removes a risk completely.

ElevatedBlack-market quality risk (fakes, contamination)

Products obtained without a prescription are often fake, mislabeled or non-sterile, and there is no way to check at home. For legal supplements, look for third-party testing (Informed Sport, NSF).

ModerateAbnormal tissue growth (theoretical cancer risk)

No check-up or blood test lowers this risk; avoid with any personal or family history of cancer.

Low-level side effects

Injection site
Sterile technique, never share needles, vials or pens; see a doctor for a hot, swollen site. If equipment was ever shared, test for HIV and hepatitis B/C and ask about hepatitis B vaccination.
Unknown long-term
What is unknown cannot be lowered, only avoided; tell your doctor what you have taken.
Water retention
Steady salt and water intake, cardio, check estradiol.
Measure
Working with a doctor
How each option helps (1)
  • Working with a doctor — Tells harmless water retention from swelling due to heart, kidney or liver trouble; steroid labels warn that edema can come with heart failure.
Numbness
See a doctor: numbness from GH-type drugs often eases after stopping; other causes need tests — vitamin B12 on metformin, copper with long-term high-dose zinc.
Measure
Working with a doctor
How each option helps (1)
  • Working with a doctor — Finds treatable causes of numbness early: low vitamin B12 on metformin, copper deficiency from excess zinc, nerve compression from GH-driven swelling.
Blood sugar
More daily movement, fewer fast carbs, check fasting glucose and HbA1c.
Measure
Glucose monitoringRegular blood testsRegular cardio trainingWorking with a doctor
Supplement or OTC product
BerberineAlpha-lipoic acidPsyllium husk fiber
How each option helps (7)
  • Glucose monitoring — Rising fasting readings reveal insulin resistance from GH or other drugs early.
  • Regular blood tests — Fasting glucose, insulin and HbA1c catch rising blood sugar early — key with GH, its secretagogues and insulin.
  • Regular cardio training — Improves insulin sensitivity — useful against the blood-sugar rise from GH and its secretagogues.
  • Working with a doctor — Interprets glucose markers and treats early metabolic problems.
  • Berberine — Meta-analyses: lower fasting glucose and HbA1c (about 0.6% in type 2 diabetes); smaller effect when glucose is normal.
  • Alpha-lipoic acid — Small drops in fasting glucose, insulin and HbA1c in meta-analyses; no real counter to GH- or insulin-driven resistance.
  • Psyllium husk fiber — Slows sugar absorption: lower fasting glucose and HbA1c, mostly in people with diabetes.

Check-ups and blood tests

Which tests and check-ups to do and when. This is a guide — agree the exact schedule with your doctor.

Baseline tests
your own starting values — every later result is compared with them
Fasting glucose, insulin, HbA1c
IGF-1
While taking
about 4–6 weeks in, then every 6–8 weeks — agree the exact schedule with your doctor
Fasting glucose, insulin, HbA1c
IGF-1
After stopping
4–8 weeks after stopping (later after long-acting injections), then until values return to baseline
Fasting glucose, insulin, HbA1c

Which doctors can help

Sports physiciancoordinates everything

Get medical help at once if

  • A new lump (including in the neck), trouble swallowing or persistent hoarseness, unexplained weight loss, or blood in stool or urine — see a doctor promptly.

In an emergency, call your local emergency number.

Myth & fact

Myth

“Sermorelin was pulled from the market because it was dangerous.”

Fact

Its maker stopped production in 2008; in 2013 the FDA determined it was not withdrawn for reasons of safety or effectiveness. That does not make off-label use in healthy adults proven or risk-free.

Combinations

No specific combination notes for this substance yet. The stack check still adds up side effects that several substances share.

Check combinations →

Sources

Federal Register 2013: Determination that GEREF (sermorelin acetate) was not withdrawn from sale for reasons of safety or effectiveness (opens in a new tab)Prakash A, Goa KL. Sermorelin: a review of its use in the diagnosis and treatment of children with idiopathic GH deficiency. BioDrugs 1999 (opens in a new tab)Dominikowski A et al. The emerging landscape of performance-enhancing peptides modulating GH-IGF1 axis. Front Endocrinol 2026 (opens in a new tab)
Check how Sermorelin combines with your stack

Possible side effects by body system, combinations, how to lower the risks and which tests to do — free.

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