In a sentence: pick based on your labs, not the marketing. If two morning tests show low testosterone, testosterone is the treatment with a label and big trials behind it. Sermorelin is a different tool for a different hormone, with far thinner evidence.
Pick TRT for diagnosed low T; sermorelin is a different, off-label call
- Pick TRT if you're a man with symptoms and repeat lab tests showing low testosterone from a medical cause. That's what the label covers [2].
- Consider sermorelin if your testosterone is normal and a prescriber wants to try a growth hormone approach. Know that the evidence is small.
- Ask about both if a program pitches them as a bundle. No trial tested the pair.
| Sermorelin | Testosterone (TRT) | |
|---|---|---|
| What it acts on | Growth hormone: prompts the pituitary to release more | Testosterone: replaces it directly |
| FDA status | Once approved as Geref; approvals withdrawn in 2009, and FDA said in 2013 that wasn't for safety or effectiveness [1]. Compounded today | FDA-approved; Schedule III controlled substance [2] |
| Who it's labeled for | No current label | Adult men with testosterone deficiency from a medical cause [2] |
| Largest human trial | 11 older men, uncontrolled, 6 weeks [6] | TRAVERSE, 5,246 men [8] |
| Body composition | No change in DEXA muscle or fat over 6 weeks [6] | Physical function trial: no walking benefit [9] |
| Fertility | No data | Label: large doses may suppress sperm production [3] |
| Key safety watch-outs | Not established; studies were small and short | Blood pressure, red blood cell count, clots; more atrial fibrillation in TRAVERSE [8] [3] |
| Forms | Injection, lozenge, dissolving tablet, nasal spray (compounded) | Injection, gel or cream, oral capsules |
| Monthly cost online | $100.38–$349 | $59–$249 |
One nudges growth hormone; the other replaces testosterone
Sermorelin is the first 29 amino acids of GHRH, the brain hormone that tells your pituitary to release growth hormone. It doesn't add growth hormone. It asks your body to make more of its own.
Testosterone therapy does the opposite kind of job. It supplies the hormone itself. That's why the label requires a diagnosis: primary hypogonadism, where the testes don't make enough, or hypogonadotropic hypogonadism, where the brain's signal is missing [2].
On muscle, neither has a clear win in these trials
This is the question most people actually ask. No trial has compared the two head to head.
For sermorelin, the key adult study gave 11 healthy men aged 64 to 76 nightly injections for 6 weeks. Nighttime growth hormone rose, but IGF-1, weight and DEXA measures of muscle and fat didn't change. Two of six strength tests improved [6]. A related 16-week study in 19 older adults used a slightly modified GHRH and measured hormones and immune cells, not muscle [7].
For testosterone, the Testosterone Trials gave 790 men aged 65 and up a gel or placebo for a year. In the physical function trial alone, walking distance didn't improve; across all three trials combined, 20.5% vs 12.6% gained at least 164 feet (50 meters) [9]. Our sermorelin and muscle guide goes deeper on the growth hormone side.
For libido, testosterone has data; for energy, neither does
| Outcome | Sermorelin | Testosterone |
|---|---|---|
| Sexual function | Not measured | Sexual activity, desire and erectile function improved in older men with low T [9] |
| Mood | Not measured | Slightly better mood and fewer depressive symptoms [9] |
| Energy (vitality) | Not measured | No significant benefit [9] |
| Sleep | Not measured as an outcome | Not a trial outcome here |
So if low libido with low lab testosterone is the issue, TRT has evidence. If energy is the main goal, neither one has shown it in a trial. The energy shortlist covers other routes.
TRT needs regular labs; sermorelin's risks are less mapped
Testosterone's risks are well studied because the trials were big. TRAVERSE found no rise in major heart events overall, with a hazard ratio of 0.96 (95% CI 0.78 to 1.17), but atrial fibrillation, acute kidney injury and pulmonary embolism were more common on testosterone [8]. Labels call for checking red blood cell levels and warn about blood pressure and clots [3].
Sermorelin's small studies reported no significant side effects [6]. That's not the same as being proven safe. With no current label, there's no official, up-to-date safety section to lean on. Ask the program which labs it uses, often IGF-1, and how often.
TRT's label is changing; sermorelin has none to change
Testosterone's rules moved twice recently. In February 2025, FDA had makers add the TRAVERSE results to every label and drop the boxed-warning language about heart risk, while adding blood pressure warnings [4]. In June 2026, FDA asked makers to remove the line saying safety and effectiveness in age-related low testosterone haven't been established [5].
As of this update, labels on DailyMed still carry that age-related line, so the change is rolling out product by product. For you, the practical point hasn't moved: TRT is for low testosterone confirmed by labs, with monitoring. Sermorelin has no current label at all, so there's nothing comparable to track.
- Ask which of your symptoms each treatment is meant to change, and how you'll measure it.
- Ask what labs come before the first prescription, and how often after.
- If you might want children, ask about fertility before starting TRT. The label warns about sperm production.
Cost and access online
Online, sermorelin runs $100.38–$349 and TRT $59–$249 a month. 73 programs sell sermorelin and 42 sell testosterone. Three publish monthly prices for both, which makes them easy to compare directly.
| Provider | Sermorelin injection per month | Testosterone injection per month |
|---|---|---|
| Maximus | $3001-month plans | Price at checkout |
| HealthRx | $179Monthly auto-renew, or prepaid 3-, 6- or 12-month plans | $179 |
Also offered by (no standing monthly price published): PeterMD. Testosterone is a controlled substance, so programs require a visit and labs before prescribing. Full price lists live on the sermorelin and testosterone pages.
Access differs too. TRT needs a diagnosis, usually two morning testosterone tests, and ongoing labs. Sermorelin programs typically check IGF-1. Use the cost guides to fold visit and lab fees into the monthly total.
For women, neither is FDA-approved
Testosterone labels cover adult men [2]. Some women's programs, such as Midi Health, prescribe testosterone off-label. Sermorelin has no current label for anyone. Either way, it's a prescriber's call outside FDA's review. For menopause symptoms, the hormones shortlist covers approved options first.
Using both: no trial tested the pair
Some programs prescribe sermorelin alongside TRT. No published trial tested the combination. If you're wondering whether sermorelin raises testosterone on its own, the studies measured growth hormone, not testosterone; see does sermorelin increase testosterone. Still deciding? The 30-second match starts from your goal.