Dosage is one of the most common points of confusion for people starting sermorelin. How much do you take? When do you take it? Does it change depending on your goal? What do you actually do with the vial when it arrives?
None of this is complicated once someone walks through it clearly. This guide covers everything from the numbers to the injection technique to how your provider will adjust things over time. If you are already injecting and just need a refresher on storage or technique, skip to the relevant section. If you are still in the research phase, read straight through.
This content is for informational purposes only. It is not a substitute for professional medical advice. Consult a licensed healthcare provider before starting any treatment.
The FDA-approved version of sermorelin (Geref) was discontinued in 2008 for commercial reasons unrelated to safety. All current adult use of sermorelin is off-label, administered via licensed compounding pharmacies. This should be understood before starting therapy.
Important: Sermorelin is not appropriate for everyone. Patients with active malignancy, untreated hypothyroidism, or known hypersensitivity to sermorelin or any component of the formulation should discuss risks with their provider before starting therapy. Women who are pregnant or breastfeeding should not use sermorelin.
The Numbers: Dosage by Treatment Goal
Sermorelin dosage is individualized. Your provider will not hand you a generic number. They will set your starting dose based on your age, body weight, IGF-1 levels, and what you are specifically trying to accomplish. That said, the ranges are consistent across most adult protocols, and they shift slightly depending on your goal.
Anti-aging and general wellness The standard range is 0.2 to 0.3 mg per night. This is where most adults start regardless of goal. At this dose, sermorelin supports the natural growth hormone pulses that drive cellular repair, sleep quality, and metabolic function.
Muscle preservation and growth The starting range is the same: 0.2 to 0.3 mg per night. Some protocols move toward 0.5 mg per day under close medical supervision if a provider determines a higher dose is appropriate for a specific patient. Doses approaching or exceeding 1.0 mg per day are uncommon. The evidence and safety data at that level are limited, and most providers stay well below it.
Weight and body composition management Again, 0.2 to 0.3 mg per night is the standard range. At this dose, sermorelin supports the metabolic effects of growth hormone (primarily fat utilization) while helping preserve lean muscle. It is not a standalone weight-loss treatment, but it can be a meaningful piece of a broader strategy.
The practical takeaway: for most adults, the starting dose is the same regardless of goal. The difference is in how long you stay on the therapy and what lifestyle factors you pair it with. Your provider adjusts from there based on your lab work and how you respond.
Treatment Goal Typical Dose Range Notes Anti-Aging / Wellness 0.2 to 0.3 mg/night Standard starting point for most adults Muscle Preservation 0.2 to 0.5 mg/night Higher end requires close medical supervision Body Composition 0.2 to 0.3 mg/night Works best paired with diet and exercise
When to Inject and Why Timing Matters
This is the part that makes the biggest practical difference in how well sermorelin works. Get the timing right and the therapy does its job. Get it wrong and you are wasting doses.
Inject at night. Growth hormone secretion naturally peaks during deep, slow-wave sleep. Sermorelin is designed to work with that cycle. Injecting in the morning or middle of the day reduces effectiveness significantly.
Inject on an empty stomach. Wait at least two hours after your last meal. Food raises insulin levels, and elevated insulin suppresses growth hormone release. That is the opposite of what sermorelin is trying to do. An empty stomach gives the peptide the environment it needs.
Inject 30 to 60 minutes before bed. This gives the peptide time to absorb and begin working before you fall asleep, which is when the growth hormone pulse it triggers will have the most impact.
All three of these factors work together. Changing one of them may reduce the overall effectiveness of the therapy. Your provider will confirm the specific schedule appropriate for your situation.
How Often to Inject
There are two common approaches, and both are used in clinical practice.
Once daily is the simpler schedule. You inject every night, same time, same routine. Many telehealth providers frame this as the default because it is easier to stick with. Adherence matters more than perfection, and a schedule you actually follow will always beat a more "optimal" schedule you skip.
Five nights on, two nights off is the other common protocol. The logic here is that the human body releases growth hormone in natural pulses with gaps in between, and this schedule more closely mimics that rhythm. Many providers, particularly those focused on long-term anti-aging protocols, prefer this approach.
Neither is wrong. Your provider will set the schedule based on their clinical preference and your specific situation. If you are unsure which one you are on, ask. It is a simple question and the answer matters for how you plan your week.
Preparing Your Injection: How to Reconstitute
Your sermorelin vial does not come ready to inject. It arrives lyophilized, which means it has been freeze-dried into a powder. You mix it with bacteriostatic water before you can use it. This step is straightforward, but getting it right matters. Done wrong, you change the concentration, which changes your dose.
What you need: The lyophilized sermorelin vial. Bacteriostatic water (included in your kit). An insulin syringe for mixing and one for injecting. Alcohol swabs. A clean, flat surface. A sharps container.
The process, step by step: Wipe the rubber stopper on both the sermorelin vial and the bacteriostatic water vial with an alcohol swab. Let them dry. Draw up the amount of bacteriostatic water your provider specified. This is usually 1 to 2 mL, but follow your exact instructions. Do not guess. Inject the water slowly into the sermorelin vial, aiming it against the inside wall of the vial to reduce bubbling. Do not shake. Gently swirl or tilt the vial until the powder is fully dissolved. The solution should be completely clear. If it is cloudy or has visible particles, do not use it. Draw up your prescribed dose into the injection syringe.
The water-to-powder ratio determines your concentration. Your provider will specify this. Getting it wrong is the single most common preparation mistake.
How to Inject: Technique
Subcutaneous injection means injecting just under the skin, not into the muscle. It is a shallow injection and significantly less painful than an intramuscular shot. Most people find it straightforward after the first two or three times.
Where to inject: Three standard sites. The abdomen, staying at least two inches away from the belly button. The outer mid-thigh. The upper arm, specifically the back of the upper arm. Rotate between these every time you inject. Do not use the same spot two nights in a row.
The injection itself: Pinch a small fold of skin at the chosen site. Insert the needle at a 90-degree angle if you are using a short needle, or 45 degrees if the needle is longer or you are very lean. Inject the full dose slowly and steadily. Pull the needle out. Apply gentle pressure with a clean swab. Do not rub.
After injecting: A brief cold pack for a minute or two helps with soreness. Some mild redness or tenderness at the site is normal for the first one to two weeks. If it does not fade within 48 hours or spreads, contact your provider. Systemic side effects have also been reported, including headache, flushing, dizziness, and drowsiness. Contact your provider if you experience any unexpected systemic symptoms.
Delivery Methods: Why Injection Is the Only One Worth Using
Sermorelin exists in three forms. They are not equivalent, and the differences are significant enough to matter.
Subcutaneous injection delivers the peptide directly into your bloodstream with high bioavailability. This is the method with the strongest evidence behind it, the most consistent results, and the lowest cost per dose. It is the standard across every serious sermorelin protocol.
Nasal spray is an alternative some providers offer. Bioavailability is lower than injection, meaning less of the peptide reaches your bloodstream in a usable form. It also costs roughly 20 to 30 percent more than injection. That is a worse deal on both the efficacy and cost side.
Oral tablets are the weakest option by a wide margin. Sermorelin is a peptide. When you swallow it, digestive enzymes break it down before it can be absorbed. The amount that actually reaches circulation is a fraction of what you took. Oral sermorelin is not a meaningful treatment method.
If you are considering sermorelin, injection is the method. The other two exist in the market, but they are not worth the tradeoffs.
How to Store Your Sermorelin
Storage is simple. Getting it wrong degrades the medication before you use it.
Before mixing: The lyophilized vial can stay at room temperature or in the refrigerator. Either is fine. Do not freeze it.
After mixing: Once reconstituted, refrigerate immediately. Store at 36 to 46 degrees Fahrenheit (2 to 8 Celsius). Do not freeze it after mixing. Freezing damages the peptide and reduces potency. Keep it away from light, either in its original packaging or a dark container in the fridge.
How long it lasts after mixing: A properly stored reconstituted vial is good for roughly 14 to 30 days. After that window, discard it. Using degraded medication reduces effectiveness and can cause irritation.
How Sermorelin Compares to Other Peptides
Sermorelin is not the only peptide that influences growth hormone. Two others come up regularly in conversations about dosing and protocols. Here is how they actually differ, so you are not comparing apples to oranges.
Sermorelin mimics the body's natural growth hormone-releasing hormone (GHRH). It triggers the pituitary to release GH in a pulsatile, physiological pattern. It is short-acting, which means it works primarily during the injection window and does not sustain GH release throughout the entire day.
CJC-1295 is also a GHRH analog, but it is engineered to last significantly longer. When it is combined with DAC (drug-affinity complex), a single injection can sustain elevated GH release for days rather than hours. The tradeoff is that it produces a more constant GH stimulus rather than the natural pulse pattern sermorelin creates.
Ipamorelin works differently. It is a selective growth hormone secretagogue receptor agonist, meaning it stimulates GH release through a different receptor pathway than GHRH. It is targeted specifically at GH with minimal effect on other pituitary hormones like cortisol or prolactin, which gives it a clean side-effect profile.
Some providers stack these peptides together. Sermorelin plus ipamorelin is one of the more common combinations. If your provider is recommending a stack, make sure you understand what each peptide is doing and why. It is a reasonable question to ask. Combination peptide therapy is off-label and has not been studied at scale in controlled clinical trials. If your provider recommends a stack, ask them to walk you through the rationale and any additional monitoring it requires.
How Your Dose Gets Adjusted Over Time
Sermorelin is not a set-it-and-forget-it therapy. Your provider will adjust your dose as treatment progresses, and the tool they use to do that is IGF-1 blood work.
Why IGF-1 is the key number. When sermorelin prompts your pituitary to release growth hormone, the liver converts that GH into IGF-1. Your IGF-1 level is the most reliable objective marker of whether your dose is producing the right amount of growth hormone activity.
Lab timing. Expect blood work every four to six weeks when you first start. Once your levels stabilize and the dose is dialed in, this usually drops to every eight to twelve weeks.
What adjustments look like in practice. If your IGF-1 is too low, your provider increases the dose, usually in small increments of 0.05 mg. If it is too high, they bring it down. If it is in the target range and you feel good, the dose stays where it is.
Dose adjustments are normal. They are not a sign that something is wrong or that the therapy is failing. Finding the right dose for your body takes a few rounds of lab work. That is the point of the monitoring.
Common Dosing Mistakes to Avoid
These are the ones that show up most often. None of them require expertise to avoid. They just require paying attention.
Injecting right after eating. The biggest one. A full stomach raises insulin, which suppresses growth hormone release. Wait the two hours.
Using the same injection site every time. Repeated injections in one spot cause scar tissue buildup and reduce absorption over time. Rotate every single time.
Getting the reconstitution ratio wrong. Too much or too little bacteriostatic water changes your concentration and therefore your actual dose. Follow your provider's instructions exactly. If you are unsure, call and ask before you inject.
Shaking the vial after mixing. Shaking damages the peptide. Swirl gently. The solution should be clear when it is properly mixed.
Skipping lab work. If your provider orders IGF-1 labs, do them. This is how they know your dose is right. Skipping it means your treatment is running without the information it needs.
Adjusting the dose yourself. If something feels off, tell your provider. Do not add or subtract on your own. Dosing errors in either direction affect both safety and results.