How Much Sermorelin Per Day: Complete Dosage Guide

Most adults begin at 200-300 mcg per day, injected subcutaneously in the abdomen 30-60 minutes before sleep. This dose reliably stimulates the pituitary without triggering the side effects (facial flushing, headache, nausea) that higher initial doses can cause.

The bedtime timing is not arbitrary. Your pituitary releases its largest GH pulse during the first 90 minutes of deep slow-wave sleep. Sermorelin amplifies this natural pulse rather than creating an artificial one at the wrong time of day. Injecting in the morning wastes the drug's mechanism of action by missing the nocturnal GH window entirely.

A clinical study on growth hormone secretagogue treatment found that patients receiving sermorelin-based therapy raised IGF-1 from a baseline of 159.5 ng/mL to 239.0 ng/mL (p < 0.0001) over a mean treatment period of 134 days (Howell et al., 2017). That 50% increase occurred within standard dosing ranges.

After 6-8 weeks at the starting dose, your prescriber orders IGF-1 blood work. If IGF-1 remains below the age-adjusted optimal range (typically 200-350 ng/mL for adults under 60), the dose increases by 50-100 mcg increments every 4 weeks until IGF-1 reaches the target window.

Most men settle between 300-500 mcg daily. Most women respond well at 200-300 mcg. The ceiling of 500 mcg exists not because higher doses are dangerous (the pituitary feedback loop protects against GH excess), but because doses above 500 mcg rarely produce additional IGF-1 elevation. You hit diminishing returns. A 16-week longitudinal study reported that optimized GH secretagogue dosing raised lean mass by an estimated 1.26 kg and increased circulating IGF-1 by approximately 28% (PMC7108996).

If you are considering adding ipamorelin to your sermorelin protocol for enhanced GH release, the combination typically allows a lower sermorelin dose (200-300 mcg) because ipamorelin stimulates GH through a complementary GHRP pathway.

For patients using sermorelin primarily for fat loss, prescribers often push toward the higher end of the range (400-500 mcg nightly) once IGF-1 labs confirm the patient tolerates the peptide well. Growth hormone mobilizes free fatty acids from adipose tissue, and higher GH pulses correlate with greater lipolysis during overnight fasting.

The weight loss protocol frequently runs daily (7 days per week) rather than the standard 5-on/2-off cycle. The rationale: consistent nightly GH pulses maximize the cumulative metabolic effect. Some practitioners combine sermorelin with CJC-1295 (a longer-acting GHRH analog) to maintain elevated GH throughout the day, not just at night. Read the CJC-1295 dosage guide for details on that combination.

Start at 200-300 mcg nightly. Men in this age bracket typically have moderate residual GH secretion, so sermorelin has a strong substrate to amplify. Expect IGF-1 to respond within 4-6 weeks. Target range: 300-500 mcg daily after titration. The 5-day-on, 2-day-off schedule helps prevent pituitary receptor desensitization over long treatment courses.

Younger men with higher baseline GH often see results faster at lower doses. If your baseline IGF-1 is already above 200 ng/mL, 200 mcg nightly may be sufficient for anti-aging and recovery goals without further increases.

Start at 100-200 mcg nightly. GH secretion declines roughly 14% per decade after age 30, a process called somatopause. By 50, most men produce 50-70% less GH than they did at 25. The pituitary still responds to sermorelin, but it responds more slowly and with a lower ceiling.

Titrate by 50 mcg increments every 4-6 weeks. Target range: 200-400 mcg daily. Men over 50 are more susceptible to joint pain, fluid retention, and carpal tunnel symptoms at higher doses because their bodies have adapted to lower GH levels for years. Gradual increases matter more in this group than any other.

Start at 100-200 mcg nightly. Women naturally produce GH in a different pattern than men: fewer large pulses, more frequent smaller pulses. Sermorelin amplifies whatever pattern exists, so women typically need lower absolute doses to achieve the same proportional IGF-1 increase.

Target range: 200-300 mcg daily. Menstrual cycle phase can affect GH secretion (higher in the luteal phase), but this does not require dose adjustments. Maintain a consistent nightly dose regardless of cycle timing. If you are exploring peptide options broadly, peptides for women over 40 covers how sermorelin fits into a larger wellness protocol.

Start at 100 mcg nightly. Post-menopausal women experience compounded GH decline from both aging and estrogen withdrawal (estrogen supports GH secretion). Starting low prevents the flushing and headaches that higher initial doses commonly trigger in this population.

Target range: 100-200 mcg daily. Some women over 50 achieve optimal IGF-1 at just 100 mcg nightly, which is the lowest effective dose in the sermorelin range. Monitor IGF-1 at 6 and 12 weeks before increasing. If response is blunted at 200 mcg, your prescriber may consider combining sermorelin with ipamorelin rather than pushing sermorelin higher.

Sermorelin peaks in blood within 5-20 minutes after subcutaneous injection and clears within 30 minutes. That short half-life is by design. The peptide triggers a GH pulse and exits, allowing the normal pulsatile rhythm to continue through the night.

Inject 30-60 minutes before you plan to fall asleep. Earlier than 60 minutes risks the GH pulse firing before you reach deep sleep. Later than 30 minutes risks falling asleep before the full dose absorbs. Set an alarm if your bedtime varies.

Your stomach must be empty. Food (especially carbohydrates and fats) triggers insulin release, and insulin directly suppresses GH secretion. A meal within 60-90 minutes of injection can blunt the sermorelin-induced GH pulse by 30-50%. Stop eating at least 90 minutes before injecting.

Sermorelin is injected subcutaneously (into the fat layer beneath the skin), not intramuscularly. Use a 29-31 gauge insulin syringe, 0.5 mL or 1 mL volume.

Step-by-step: 1. Wash hands. Clean the injection site with an alcohol swab and let it air dry. 2. Pinch a fold of skin on the abdomen (2 inches from the navel) or outer thigh. 3. Insert the needle at a 45-degree angle into the skin fold. 4. Inject slowly over 5-10 seconds. 5. Withdraw the needle and apply gentle pressure with a cotton ball. Do not rub. 6. Rotate injection sites each night. Alternate left and right sides of the abdomen.

For a complete visual walkthrough of subcutaneous technique, read how to inject peptides. If you are reconstituting sermorelin from lyophilized powder, see how to store peptides for refrigeration and stability guidelines.

Sermorelin typically ships as a lyophilized (freeze-dried) powder in 3 mg, 6 mg, or 9 mg vials. You reconstitute it with bacteriostatic water before drawing doses.

Reconstitution math for a 6 mg vial: - Add 2 mL bacteriostatic water = 3,000 mcg per mL (3 mg/mL) - For a 300 mcg dose, draw 0.10 mL (10 units on an insulin syringe) - For a 500 mcg dose, draw 0.167 mL (approximately 17 units)

Reconstitution math for a 9 mg vial: - Add 3 mL bacteriostatic water = 3,000 mcg per mL (3 mg/mL) - For a 300 mcg dose, draw 0.10 mL (10 units) - For a 500 mcg dose, draw 0.167 mL (approximately 17 units)

Use our peptide reconstitution calculator to verify your concentration before drawing the first dose. A wrong dilution is the number one cause of under- or over-dosing.

A dose below 100 mcg daily sits beneath the activation threshold for most adults. The pituitary receives a GHRH signal too weak to trigger a meaningful GH pulse. You pay for the peptide, inject nightly, and get no measurable IGF-1 increase after 8 weeks.

This scenario is common in two groups: patients who reconstituted incorrectly (diluted the vial with too much bacteriostatic water) and patients who self-reduced the dose after experiencing mild initial flushing. Flushing at 200-300 mcg is a normal vasodilatory response that typically resolves within 1-2 weeks. Dropping to 50-100 mcg to avoid it eliminates the therapeutic effect entirely.

The fix: Verify reconstitution math using a peptide reconstitution calculator. If flushing is intolerable, drop to 150 mcg for 2 weeks rather than 50 mcg, then resume the standard starting dose.

Some users push past 500 mcg nightly without blood work, reasoning that more sermorelin equals more GH. At best, doses above 500 mcg produce no additional IGF-1 elevation because the pituitary has already released its maximum pulse. At worst, supraphysiological GH stimulation over months can produce fluid retention, joint pain, carpal tunnel symptoms, and potential insulin resistance.

A study on GH excess symptoms noted that even moderately elevated IGF-1 (above 350-400 ng/mL in adults over 40) correlates with increased joint pain and fluid retention within weeks (Colao et al., 2004). These symptoms reverse when the dose decreases, but patients who dose blindly without labs may not recognize the connection until symptoms become disruptive.

The fix: Never exceed 500 mcg nightly without IGF-1 lab confirmation. If your prescriber orders a dose increase beyond 500 mcg (rare), request follow-up labs within 4 weeks.

You eat dinner at 9 PM, inject sermorelin at 9:30 PM, and go to bed at 10 PM. Insulin from the meal is still elevated. Insulin directly suppresses GH release at the pituitary level. The sermorelin-induced pulse that should fire during deep sleep is blunted by 30-50%, and you receive a fraction of the therapeutic benefit.

Over weeks, this pattern mimics underdosing. Your prescriber sees low IGF-1, increases the dose, and you still do not respond because the timing problem remains unsolved. One clinical practice guideline noted that postprandial insulin elevations lasting 90-120 minutes after moderate carbohydrate meals significantly reduce GH secretion in response to GHRH stimulation (Hartman et al., 1992).

The fix: Stop eating 90 minutes before injection. If you cannot manage a 90-minute fast, aim for at least 60 minutes and avoid carbohydrates and fats in the last meal. Protein has the smallest insulin impact.

This is the gold standard GH-releasing stack. Sermorelin activates the GHRH receptor; ipamorelin activates the ghrelin (GHRP) receptor. Together, they produce a GH pulse roughly 2-3 times larger than either alone. The synergy means you can use lower doses of each peptide and still achieve superior results.

Typical combined protocol: - Sermorelin: 200-300 mcg nightly - Ipamorelin: 200-300 mcg nightly (same injection, or separate injections within 5 minutes) - Timing: Both injected 30-60 minutes before bed on an empty stomach - Cycle: 5 days on, 2 days off

This combination is sometimes sold pre-mixed by compounding pharmacies. If you are purchasing separate vials, they can be drawn into the same syringe. Read the CJC-1295/ipamorelin benefits guide for clinical data on the GHRH + GHRP synergy.

Both sermorelin and CJC-1295 (no DAC) target the same GHRH receptor. Stacking them does not produce the synergy seen with sermorelin + ipamorelin. However, some practitioners prescribe low doses of both (e.g., 100 mcg sermorelin + 100 mcg CJC-1295 no DAC) on the theory that CJC-1295's slightly longer half-life extends the GH release window.

Clinical evidence for this combination is thin compared to the sermorelin + ipamorelin stack. If your prescriber recommends it, follow their protocol. If you are choosing your own stack, sermorelin + ipamorelin has stronger clinical support. For an in-depth comparison, see CJC-1295 vs. sermorelin.