Not medical advice. Talk to your provider before using any peptide.
Full disclaimerPeptide Schedule Research TeamReviewed Apr 20266 Citations
HGH 191AA16 residuesYLRIVQCRSVEGSCGFEach bubble = one amino acid. Size = residue mass. Color = chemical class.Turns your vial size, BAC water, and dose into exact syringe units. Free, no signup.
Adjust vial, water, and dose — answer updates live
All three take the same units for the same dose. A smaller barrel just spreads it over more space.
on a U-100 syringe for a 200mcg dose
Add 1 mL BAC water to your 3.3 mg vial. Draw to 6.1 units on a U-100 syringe for a 200mcg dose. This vial will last 16 doses.
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Never miss a dose — 200mcg daily, draw 6.1 units on U-100 syringe.
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HGH 191AA is recombinant somatropin, the same 191-amino-acid growth hormone your pituitary makes. FDA-approved for growth hormone deficiency, it's used off-label for fat loss, recovery, and anti-aging at doses well above clinical guidelines. Quality varies wildly by source and manufacturer.
Growth hormone vials are labeled in international units (IU), but the dose is a mass in milligrams. Recombinant HGH (somatropin) is standardized at 3 IU per mg, so 1 IU is about 0.33 mg (333 mcg). This ratio is specific to growth hormone and does not apply to other peptides.
| IU | mg | mcg |
|---|---|---|
| 1 IU | 0.33 mg | 333 mcg |
| 2 IU | 0.67 mg | 667 mcg |
| 4 IU | 1.33 mg | 1,333 mcg |
| 10 IU | 3.33 mg | 3,333 mcg |
| 15 IU | 5 mg | 5,000 mcg |
| 24 IU | 8 mg | 8,000 mcg |
| 36 IU | 12 mg | 12,000 mcg |
| mg | IU | Formula |
|---|---|---|
| 1 mg | 3 IU | mg x 3 |
| 3 mg | 9 IU | mg x 3 |
| 5 mg | 15 IU | mg x 3 |
| 10 mg | 30 IU | mg x 3 |
Need syringe units for a specific dose? Enter your vial size and BAC water in the calculator above, or open the peptide unit converter.
View side effects and safety warnings →
| Level | Dose / Injection | Frequency |
|---|---|---|
| Beginner | 200mcg | Daily |
| Moderate | 500mcg | Daily |
| Aggressive | 1mg | Daily |
The IU-to-mcg conversion trips up most beginners: 1 IU equals roughly 333 mcg. A 10 IU vial holds about 3.3 mg of somatropin. A 15 IU vial holds roughly 5 mg. Reconstitution math for the standard 10 IU vial: add 1 mL bacteriostatic water. That gives you 10 IU per mL. On a U-100 insulin syringe, 10 units equals 1 IU (333 mcg). For the beginner dose of 200 mcg (0.6 IU), draw 6 units. Moderate dose of 500 mcg (1.5 IU) is 15 units. Aggressive dose of 1000 mcg (3 IU) is 30 units. Swirl the vial gently after adding water. Never shake or vortex somatropin; the protein is fragile and shaking creates dimers that increase side effects. Store reconstituted vials at 2 to 8 degrees Celsius and use within 28 days. Lyophilized (powder) vials also belong in the fridge. Never freeze reconstituted HGH. Morning fasted injection maximizes fat mobilization. Pre-bed injection amplifies the natural nocturnal GH pulse and tends to improve sleep quality. Split dosing (AM plus PM) is common at 3 IU per day or above.
Dosing based on Compounded HGH somatropin: community dosing consensus — 7 published references.View all sources →
Based on a 3.3mg vial, 1mL of bacteriostatic water, the beginner dose (200mcg), and a U-100 syringe. Change any input in the calculator and every line moves with it.
Cross-check your HGH 191AA reconstitution math with AI
Pricing updated 2026-04-09
Prices are estimates and vary by source, location, and prescription status.Full pricing breakdown →
Disclaimer: This curve is a simplified first-order exponential decay model. Actual pharmacokinetics vary based on injection site, individual metabolism, body composition, and other factors. Half-life values are approximate and based on available preclinical and clinical literature. Many research peptides lack formal human pharmacokinetic studies. This is for educational purposes only — not medical advice.
