Sermorelin Dosage: How Much to Take in 2026
Common adult ranges, when to inject, and how a physician sets your dose.
Sermorelin dosage for adults usually falls between 200 and 500 micrograms (mcg), injected under the skin once a day at bedtime. Most people start low, around 200 to 300 mcg, and a physician adjusts the dose over time based on how they respond and on IGF-1 blood work. Sermorelin is a GHRH analogue that signals your own pituitary to release growth hormone. The right dose is set by a prescriber, not by a chart you found online.
How much sermorelin do adults take?
Sermorelin is most often dosed at 200 to 500 mcg, injected under the skin once a night. Most adults start near the low end, about 200 to 300 mcg, and some prescribers begin at 100 mcg for the first week or two before moving up. Sermorelin is a GHRH analogue, so the goal is to nudge your own pituitary rather than replace a hormone. The numbers below are a reference, not a prescription.
How popular is Sermorelin?People search for Sermorelin about 110,000 times a month in the US, one of the most-searched peptides (2026 search data). See the Peptide Popularity Report for the full ranking.
| Stage | Typical nightly dose | Timing | What guides it |
|---|---|---|---|
| Starting | 100-300 mcg | Bedtime, empty stomach | Age, weight, baseline IGF-1 |
| Common range | 200-500 mcg | Bedtime, empty stomach | Response plus IGF-1 labs |
| Adjustment | Steps of about 50-100 mcg | After 4-6 weeks | Repeat IGF-1 vs the mid-normal range |
Doses are written in micrograms (mcg), where 1,000 mcg equals 1 milligram (mg). So a 0.3 mg dose is 300 mcg. For a full picture of what sermorelin is and does, see the sermorelin guide.
When should you inject sermorelin?
Sermorelin is usually injected once a day at bedtime, on an empty stomach. That timing lines up with your body's largest natural growth-hormone pulse, which happens during deep sleep. Sermorelin has a short plasma half-life of about 11 to 12 minutes, so pairing the dose with that nightly window is the point of the whole schedule.
- Inject right before sleep, not hours earlier.
- Keep it on an empty stomach. Food, especially carbs and fats close to the injection, can blunt the growth-hormone response.
- Rotate the injection site (belly, thigh) each night to keep the skin comfortable.
- Follow the exact schedule your prescriber gives you, since some protocols use 5 nights on with 2 off.
How is a sermorelin dose titrated?
Sermorelin dosing is titrated, meaning a physician starts low and adjusts based on lab work. The key marker is IGF-1, a blood value that reflects how much growth hormone your body is releasing. Titration is why sermorelin is a prescription therapy and not a fixed dose off a shelf.
- Baseline: check IGF-1 before starting so there's a number to compare against.
- Start low: begin at a conservative dose, often 100 to 300 mcg nightly.
- Recheck at 4-6 weeks: repeat IGF-1 to see the response.
- Adjust: if IGF-1 is still below the mid-normal range, the dose may rise in small steps; if side effects show up, it may hold or drop.
Why labs matterIGF-1 gives your physician an objective signal instead of guesswork. It's the reason a dose is personalized rather than copied from a forum.
What decides your sermorelin dose?
Your sermorelin dose is individualized. A physician weighs several factors together rather than picking a one-size number, which is why two people can land on very different amounts.
- Age and baseline IGF-1 level
- Body weight and body composition
- Your goals, such as recovery, sleep quality, or lean-mass support
- How well you tolerate the starting dose
- Other medications and health history
How is sermorelin measured and mixed?
Compounded sermorelin usually arrives as a freeze-dried (lyophilized) powder that's mixed with bacteriostatic water before use. Once mixed, the dose is drawn into an insulin syringe and measured in units, and your pharmacy label translates your mcg dose into the right number of units on the syringe. This is why a dosing question is really a pharmacy question.
- The vial concentration (how much powder, how much water) sets how many units equal your dose.
- A pharmacy-grade fill comes with a label that spells out units per dose, so you're not doing the math alone.
- Store the vial as directed, usually refrigerated once reconstituted.
- If the units on your label don't match what you expected, ask your prescriber before injecting.
Can the dose cause side effects?
Sermorelin's side effects are usually mild and tend to show up early, often in the first one to two weeks. The most common are injection-site reactions, brief flushing, and headache. Starting low and titrating slowly is partly meant to keep these manageable.
| Effect | What people notice | How often |
|---|---|---|
| Injection-site reaction | Redness, mild swelling, or bruising | Up to about 1 in 6 users |
| Flushing | Warmth or redness in the face or neck, often minutes after the dose | Occasional, usually brief |
| Headache or dizziness | Mild, early in treatment | Occasional |
| Nausea or transient fatigue | Short-lived, first weeks | Less common |
Rotating sites helps with local reactions. If something new appears after weeks of a stable dose, tell your prescriber. For the full picture, see sermorelin side effects.
What if you miss a dose or take too much?
If you miss a nightly sermorelin dose, the usual guidance is to skip it and resume the next night rather than doubling up. Because the therapy works with your nightly growth-hormone rhythm, one missed dose is a small thing, not a reason to stack two.
Follow your labelAlways follow the missed-dose and storage instructions your prescriber and pharmacy give you. If you ever inject more than your prescribed dose or feel unwell, contact your prescriber.
Why dosing your own research vials is risky
The real dosing danger isn't sermorelin itself, it's grey-market vials sold as research chemicals. These are labeled not for human use, come with no prescriber, and carry no verified strength or purity. That means the mcg on the label may not match what's in the vial, so any dose you calculate is a guess.
- No prescriber means no one is reviewing your health history or your IGF-1 labs.
- No pharmacy oversight means no confirmed concentration to base your units on.
- "Research-grade" labeling exists to sidestep the rules that keep dosing safe.
The fix is simple: get a real prescription and a pharmacy-verified fill. See where to buy sermorelin for how to do that the right way.
How pru handles sermorelin dosing
At pru, you don't set your own sermorelin dose from a chart. A licensed physician reviews your health and confirms whether sermorelin fits, then an FDA-regulated 503A pharmacy compounds a pharmacy-grade fill with a label that spells out your dose in syringe units. You select the peptide with pru's guidance; the physician confirms the clinical fit.
Pricing is different too. pru runs on a flat membership of about $50 a month, billed annually, and offers the peptide separately at cost, itemized, with no markup on the medicine. As your dose changes the medicine can cost a little more, but it never carries a member markup.
Being proactive about how you recover and age is a smart move, and pru exists to make that informed choice easy to act on, with a licensed physician, pharmacy-grade medicine, and at-cost pricing in one place. When you are ready, see sermorelin, browse Muscle & Performance, or check pricing.
Related reading
- Sermorelin guide: what it is and how it works
- Sermorelin benefits
- Sermorelin side effects
- Sermorelin vs ipamorelin
- Growth hormone peptides guide
- Shop sermorelin
Common questions
Sources & further reading
- https://www.federalregister.gov/documents/2013/03/04/2013-04827/determination-that-geref-sermorelin-acetate-injection-05-milligrams-basevial-and-10-milligrams
- https://en.wikipedia.org/wiki/Sermorelin
- https://pubmed.ncbi.nlm.nih.gov/10193689/
- https://www.empowerpharmacy.com/compounding-pharmacy/sermorelin-acetate-injection/
- https://www.rxlist.com/sermorelin-acetate-drug.htm
- joinpru.com/shop/product/sermorelin