Sermorelin before and after: what controlled studies actually measured

Sermorelin results look much smaller in controlled studies than in clinic photos. The adult studies enrolled 19 people or fewer and lasted between two and sixteen weeks. They measured blood hormones, body composition scans and questionnaires, and found modest changes in some of them. The biggest measured change belongs to children with growth hormone deficiency, whose growth rate roughly doubled. No sermorelin product is FDA-approved today, and what is prescribed now is compounded. If you came here wondering what a person might look like after three months, no study can tell you.

What the controlled studies measured

The Khorram studies used [Nle27]GHRH(1-29), an analogue that differs from sermorelin at one position, and the Murck study used GHRH without specifying the form, so neither is a test of sermorelin itself. They are included because they are among the few controlled adult studies of this drug class that measured body composition or sleep.

What the numbers add up to

Hormones move, bodies barely do. The most consistent finding is that growth hormone rises with dosing. IGF-1, the hormone that carries many of growth hormone’s effects to tissues, rose with twice-daily dosing and with the Khorram analogue but not with a single 2 mg nightly dose. Changes in muscle and fat were small and appeared in men only, in one study.

Effects wore off. In Khorram 1997, IGF-1 drifted back toward baseline by week 16 while dosing continued.

Sleep did not improve. The two adult studies that looked at sleep found no benefit. This matters because better sleep is one of the most common claims made for sermorelin online.

Children are a different case. The clearest before-and-after result is growth in children who lacked growth hormone, which is what Geref was approved for. Even there, the 1999 BioDrugs review notes the gain was smaller than with growth hormone itself.

Nobody tested appearance or weight loss. No published controlled study of sermorelin used weight loss, waist size or photographs as its main outcome.

Sermorelin results timeline: what was measured and when

Sermorelin results in the studies show up in blood tests first, and there is no week-by-week record of how a body looks. Here is everything measured, in order.

Week 6 is the most useful row for an adult wondering about body fat. Vittone is the only study here that scanned body composition on sermorelin itself, and it found no change. A longer course might behave differently, but we found no study that tested it.

Results in men and women

Sermorelin has barely been studied in women. The Corpas and Vittone studies enrolled men only, so the only women in these adult studies are the 10 in Khorram 1997, who received a close analogue. They had a rise in skin thickness and in hormone levels, with no change in lean mass, well-being or libido. Men in the same study gained lean mass and reported better well-being and libido. The authors called for more work to explain the difference, and a study of 19 people cannot settle it. Claims that sermorelin gives women a particular result rest on no controlled data we could find.

After you stop

The one measured result on stopping comes from children, not adults. In Kirk 1994, 18 short children without growth hormone deficiency were recruited for a year of twice-daily treatment. In the three months after it ended, growth dropped to 3.89 cm a year, a slowdown the authors called catch-down growth. Whether adults keep any change after stopping is unknown, since none of the adult studies here reported follow-up after treatment ended.

Why before-and-after photos are not evidence

A before-and-after photo answers a different question from a trial. A trial asks: compared with people who did not get the drug, what changed? A photo can only show that someone looks different on two days. Reasons a photo can show a change that the drug did not cause:

• No comparison group. Most people who start a peptide also change diet, training, sleep or alcohol at the same time. A photo cannot separate those.
• Other drugs. Compounded sermorelin is often prescribed alongside other hormones or blended with other peptides. FDA’s 2024 ipamorelin briefing documented compounded vials combining sermorelin and ipamorelin.
• Lighting, pose and timing. Overhead versus side light, a flexed versus relaxed posture, a morning versus evening photo, and water retention all change how a body looks within a single day.
• Selection. Clinics and sellers publish the best results they have. The people with no change are not photographed.
• The studies point the other way. The one study that scanned body fat with DEXA after six weeks of 2 mg nightly found no change.

None of this means nobody feels or looks different. It means a photo cannot tell you whether sermorelin was the reason, and the controlled data that can tell you show small effects.

Sermorelin’s adult data sit on the small-human-studies rung. A photo is not on the ladder at all.

How to judge a result someone shows you

If a clinic or a friend shows you a transformation, a few questions separate a real signal from a good picture:

• Was there a blood test before and after, and did IGF-1 actually change?
• Were sermorelin and nothing else used? Ask about testosterone, GLP-1 drugs and other peptides.
• Did diet or training change in the same months?
• Was the body composition measured with a scan, or judged by eye?
• How many patients did not get a result like this one?
• Is the person showing it to you selling the treatment?

For your own decision, tracking measurable things with a prescriber tells you more than a mirror. The sermorelin side effects guide covers the tests and warning signs that belong in that conversation, and sermorelin vs tesamorelin shows what a large, placebo-controlled trial of a related drug looks like.

Status and legality

No sermorelin product is FDA-approved today. Geref was approved for children with growth hormone deficiency in 1997, discontinued in 2008 and withdrawn in 2009, and FDA determined in 2013 that the withdrawal was not for safety or effectiveness. FDA wrote in 2024 that no growth hormone secretagogue has been approved for growth hormone deficiency in adults. Pharmacies compound sermorelin with a prescription; research-only vials sold online are not legal to use on people. For doses used in each study see sermorelin dosage, and for the current legal position see the FDA status tracker.