BEFORE & AFTER
Sermorelin Before and After in the Studies
The measured changes — in growth hormone, IGF-1, growth rate, and body fat — that trials recorded from start to finish, with timelines and honest gaps.
What 'before and after' means here
When people search sermorelin before and after, they usually want photos and testimonials. This page does something more useful and more honest: it shows the measured before-and-after changes that real studies recorded — the numbers for growth hormone (GH), IGF-1, growth rate, and body fat, from the start of a study to its end. No photos, no testimonials, no promises. Three things to keep in mind as you read. First, the most solid before-and-after data are about hormone levels, not appearance. Second, the body-fat before-and-after numbers come mostly from a close relative of sermorelin (tesamorelin), not from sermorelin itself. Third, every figure below names the study and the group it came from, so you can see exactly whose 'after' you're reading. The references are on the Sermorelin references page.
Before and after: growth hormone and IGF-1
The cleanest before-and-after in the sermorelin record is hormonal. In healthy older men (mean age 68), 14 days of twice-daily GHRH(1-29) moved 24-hour GH and IGF-1 from age-lowered 'before' levels to an 'after' that, at the higher dose, no longer differed from young men — with fasting blood sugar unchanged [3]. In the pharmacokinetic study, the 'after' of a single dose was a roughly 3-hour window of elevated GH following each administration, even though the peptide itself cleared the blood within minutes [4]. These are the before-and-after changes sermorelin most reliably produces: a measurable, repeatable lift in the body's own GH and IGF-1.
Before and after: growth in children
Sermorelin's original, approved before-and-after was in growth-hormone-deficient children. In a multicenter trial, once-daily subcutaneous sermorelin raised first-year growth speed from a 'before' of about 4.1 cm/year to an 'after' of roughly 7-8 cm/year — without driving IGF-1 to excessive levels [2]. That near-doubling of growth velocity is the most concrete clinical before-and-after in the whole sermorelin literature, and it's the use the drug was actually approved for [6].
Before and after: body fat and composition
For the body-composition before-and-after that draws most searches, the strongest numbers come from the GHRH analog tesamorelin, not sermorelin itself — a distinction this page keeps explicit. In a 20-week randomized trial in older adults, the analog moved percent body fat down by about 7.4% from baseline to study end, with IGF-1 rising 117% into the normal range [7]. A separate randomized trial in adults with obesity and reduced GH recorded body-composition changes from the same GHRH-analog approach over its study period [8]. These are genuine before-and-after measurements — but read them as the analog's results, applied to sermorelin only by shared mechanism, not by a matching sermorelin trial [10].
How long do the changes take?
Timelines in the studies are concrete. The hormonal before-and-after appears fast: dose-related GH/IGF-1 rises were measurable within the 14-day older-men study [3]. The body-fat before-and-after in the analog trial unfolded over 20 weeks — roughly five months — which fits the common three-month forum question about whether that's 'long enough' [7]. The pediatric growth before-and-after was reported over the first year of therapy [2]. So the pattern across the literature: blood-hormone changes in weeks, body-composition changes over months, and a frank absence of multi-year sermorelin data in healthy adults [5].
Why this page has numbers, not testimonials
Personal before-and-after stories exist all over the internet, but they're anecdotes — uncontrolled, unverified, and easy to misread. This page sticks to measured outcomes from cited studies because that's the difference between what's reported and what's demonstrated [5]. Where people's own reports add honest context — sleep, recovery, injection-site reactions — we put them, clearly labeled as anecdotal, on the Sermorelin effects page, kept separate from the trial data above. The before-and-after that matters most here isn't a photo; it's a number with a study attached to it.