Sermorelin Before and After: A Realistic Results Timeline and Dosage

The short answer

In the trials, sermorelin-type injections raised growth hormone within minutes and IGF-1 within about two weeks. By four months, men gained some lean mass and both sexes had thicker skin, but weight, fat and sleep quality did not change. Most dramatic "before and after" photos show diet, training or a GLP-1, not sermorelin alone.

What changes, and when?

Sermorelin is the first 29 amino acids of growth-hormone-releasing hormone (GHRH). A nightly injection tells your pituitary to release a pulse of your own growth hormone. That part is not in doubt. What happens downstream is slower, smaller and less even than most clinic marketing suggests.

Two small trials in older adults give the clearest timeline. One used sermorelin itself (GHRH 1-29) at 2 mg every night for six weeks in eleven men aged 64 to 76¹. The other used a close analog of sermorelin at 10 µg/kg every night for 16 weeks in nine men and ten women aged 55 to 71, after a month of placebo injections²³.

Read the timeline as what researchers measured, not as a promise. These were small studies of older adults, and the longer one used an analog rather than the exact molecule compounding pharmacies make.

What did the trials actually measure?

Growth hormone goes up fast. In the 16-week trial, each nightly injection released growth hormone within 10 minutes, and the pulse lasted about two hours. The effect held for the whole study².

IGF-1 rises, then drifts back. IGF-1 (the hormone growth hormone works through) was up within two weeks and stayed up through week 12. By week 16 it was heading back toward baseline in both men and women, even with nightly dosing². In the six-week trial of sermorelin itself, nightly growth hormone went up but IGF-1 did not change at all¹.

Body composition barely moved. After six weeks, the scans showed no change in weight, muscle, fat, glucose or lipids. Two of six strength tests and one endurance test improved¹. After 16 weeks, men gained lean mass and became more insulin-sensitive. Women did not. Weight, blood pressure and bone density were unchanged in both².

Skin got thicker in both sexes. Caliper measurements of skin thickness rose in men and women over 16 weeks². This is the one change a photo might plausibly capture.

Sleep did not improve. Clinics often sell sermorelin on better sleep. The 16-week trial measured sleep quality by questionnaire and found no change in either sex. Men did report better general well-being and libido².

Immune markers shifted. The same trial found more B cells and more activated T cells by week 16. What that means for infection risk or aging is not known³.

Typical dosing: what was studied and what is sold

Your prescriber sets your dose. The table below shows what each study used and is not dosing advice.

The approved doses come from FDA's own summary of the two Geref products⁵. Compounded programs usually sell a vial meant to last about a month. One graded provider sells a "monthly supply" of 9 mg, which works out to about 0.3 mg a night over 30 days (System Labs). That is well below the 2 mg used in the six-week trial. No trial has compared low nightly doses with the doses studied.

Both adult trials dosed at night, when the body's own growth hormone pulse is largest. If your prescriber suggests a different time, ask why.

Why do sermorelin before-and-after photos mislead?

The trials are the fairest "before and after" available, and they show modest changes. A dramatic photo usually has another explanation:

• •Diet and training. People who start a peptide program often change how they eat and train at the same time. In the six-week trial, scans showed no change in fat or muscle at all¹.
• •A GLP-1 in the same plan. Several providers that sell sermorelin also sell compounded semaglutide or tirzepatide. Real weight loss in a photo is far more likely to come from a GLP-1 than from a growth hormone releaser.
• •Lighting, posture, timing. Nothing in the trials suggests visible change in under a few weeks.
• •Sex differences. The only lean-mass gain in the 16-week trial was in men². Women expecting the same change may not see it.

For context, growth hormone itself, which is a much stronger signal than sermorelin, adds only about 2 kg of lean mass and removes about 2 kg of fat in healthy older adults, with real side effects and no proven gain in strength⁴.

What does sermorelin cost per month?

Prices below come from each seller's own public website, as shown on our provider ranking. Sorted by price, not by quality. Look for the plan length behind each number.

Realistic month-to-month cost runs from about $99 to $300. The full field, including lozenges, nasal sprays and providers that publish nothing until after an intake, is on the provider ranking.

How do you know if sermorelin is working for you?

Photos and the mirror are unreliable. These are better signals:

• •IGF-1 blood test. Get a baseline before you start and a recheck at around 8 to 12 weeks. In the 16-week trial, IGF-1 rose within two weeks². If yours has not moved, ask your prescriber whether the dose or timing is right.
• •Body composition scan, not the scale. The changes in the trials were in lean mass, not weight². A DEXA scan or a consistent body-composition measure is more useful than a bathroom scale.
• •A simple strength log. The six-week trial found small gains on some strength tests but not others¹. Tracking a few lifts gives you an honest before and after.
• •A sleep diary, if sleep is your reason. The trial that measured sleep quality found no change², so track it yourself rather than relying on how you feel in the first week.

If none of these move after three to four months, the honest conclusion is that it is not doing much for you.

Is compounded sermorelin FDA-approved?

No. Sermorelin was FDA-approved as Geref, first in 1990 as a diagnostic test and then in 1997 to treat growth hormone deficiency in children. The maker discontinued both products in 2008, and FDA withdrew the approvals in 2009. In 2013, FDA formally determined that Geref was not withdrawn for reasons of safety or effectiveness⁶.

Today there is no approved sermorelin product in the U.S. What telehealth clinics sell is compounded, and FDA states that compounded drugs are not FDA-approved and are not checked for safety, effectiveness or quality before sale⁷. Sermorelin does not appear on FDA's lists of nominated compounding ingredients under evaluation or flagged for safety concerns (May 2026 update)⁸. Pharmacies generally rely on Geref's former approval as the basis for compounding it.

For side effects and who should avoid it, see sermorelin side effects. For the bigger picture on growth hormone and aging, see sermorelin for longevity and the sermorelin hub.

The honest summary

Sermorelin does what it says biologically: it makes your pituitary release growth hormone. In older adults, that showed up as higher IGF-1 for a few months, thicker skin, and some lean mass and insulin-sensitivity gains in men. It did not change weight, fat or sleep in the trials. No study shows it slows aging.

If you try it, judge it against the trial timeline above, give it at least three months, and check the real monthly price before you start. Compare it with other options in peptides for longevity.