WHAT THE STUDIES MEASURED
Sermorelin changed IGF-1, a liver-made growth hormone, body fat, and growth
The work runs from 1996 through a 2025 review. You’ll get the results first, then the catches that matter.
What Sermorelin makes your growth gland do
Blood tests changed first. Sermorelin made the small growth gland under your brain release more growth hormone [6].
Here’s the plain meaning. Sermorelin is a peptide, a small string built from protein pieces.
The drug uses 29 pieces from a natural body string of 44 parts. Those pieces copy an order from your brain.
Your growth gland hears that order. The gland then makes and releases growth hormone.
Geref was the old brand name. Doctors used Geref for children who lacked enough growth hormone.
The maker quit selling Geref in 2008 when one ingredient ran out. No safety finding caused that choice [1].
The studies included children, older adults, and men with fat changes tied to HIV [2][4][10], so you can give those human findings more weight than animal or dish work alone.
Sermorelin isn’t a shot of growth hormone. Your gland still decides how much hormone reaches your blood [6].
IGF-1 is another hormone, made mostly by the liver after growth hormone arrives. Doctors measure the blood level to see how strongly your body answered.
When that level rises, your brain can make your gland ease off [5]. That may help keep both hormones from climbing too far.
You can judge what happened in those people. Their results can’t promise yours.
What Sermorelin changed in grown adults
IGF-1 isn’t a blood test. It’s a hormone made mostly by the liver after growth hormone arrives.
Blood tests moved before bodies looked different. Sermorelin made your growth gland release hormone in brief waves [6].
The brain can slow those waves when hormone levels rise. Doctors watch IGF-1 for that later change.
Growth hormone put straight into your body goes around your gland’s control [5]. Sermorelin depends on your gland doing the work.
A 2001 study gave older adults a skin shot at night. The amount was about 14 millionths of a gram per kilo of body weight.
After 5-6 months, IGF-1 was about 35% higher. Belly fat fell, while muscle and other fat-free weight rose about 5% [4].
A 2004 trial followed men with fat buildup tied to HIV. Each man got 1 milligram under the skin twice a day.
The average IGF-1 rise was 104 billionths of a gram per milliliter. The placebo group, given shots with no drug, rose by 6 billionths of a gram per milliliter.
Doctors can compare those tiny lab figures because both groups used the same units, but you can’t judge your own level without the normal range for your age and health. The men also gained fat-free weight and lost deep belly fat [10].
The changes were clear for those men. They don’t predict what your body would do.
What Sermorelin changed in growing children
IGF-1 isn’t a blood test. It’s a hormone made mostly by the liver after growth hormone arrives.
The shots didn’t contain growth hormone. They made each child’s growth gland produce more [5].
As IGF-1 rose, your brain could make your gland release less. A 2006 review said that control may matter.
The gland released growth hormone in waves, not a steady stream [5]. A review still can’t promise help for your family.
Children who lacked growth hormone showed the clearest result. The paper called 74% of 110 children good responders in year one.
By 6 months, those children grew at almost twice their old speed [2]. That measured speed explains what the paper meant by response.
Adult your blood results aren’t as clear. One study checked fat and thought skills over 5-6 months [4].
A 2017 study gave men Sermorelin plus two other drugs. It can’t show which drug caused the change [9].
The sermorelin dosage page shows study amounts. The sermorelin side effects page names the harms found.
What Sermorelin is, and what it isn’t
No. Sermorelin isn’t a steroid. It’s a peptide, meaning a small string made from protein pieces [6].
Steroids and peptides have different parts. Sermorelin works at the outer wall of growth-gland cells, while steroids enter cells.
US law doesn’t place Sermorelin with tightly controlled drugs. For patient care, sermorelin injections need a clinician’s prescription; research-labelled sermorelin is still sold for lab work.
Sports rules take a harder line. The world drug-testing group bars Sermorelin because the drug can raise growth hormone [1].
Why doctors call Sermorelin a peptide
Yes, Sermorelin is a peptide. That means it’s a small string put together from protein pieces.
Its pieces match the front part of a longer string your body makes [6]. Blood breaks the smaller drug apart fast.
In a 1994 vein test, half had was gone from your blood in minutes [7]. The gland kept responding after that.
Fast removal doesn’t mean every body change ended at once. The dosage page explains the timing.
See sermorelin dosage for amounts used in studies. The growth hormone-releasing hormone research page gives results and limits.
What researchers measured after Sermorelin
Early studies checked whether children made enough growth hormone. From 1991–2008, they also watched how quickly children grew [1][2][3].
Later work measured fat and other changes in older adults [4][5]. A 2004 trial studied men with fat buildup tied to HIV [10].
Other your blood tests recorded when growth hormone rose [6][8]. One study gave several drugs to men low in testosterone [9].
A 2025 review covered related drugs in several illnesses [17]. Another 2025 review described how your gland gets your brain’s order [6].
Neither review proves a new benefit from Sermorelin. Direct studies in people give you the sounder footing.
Use the frequently asked questions for quick replies. Read sermorelin side effects for known harms and missing facts.
You’ll learn who changed and by how much. You won’t get a forecast for yourself.