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Reviewed by MyPeptideMatch Editorial TeamLast reviewed February 2026Updated February 2026

HGH 191AA Dosing Protocol: 10 IU Vial — Daily Dosing Schedule & Supplies

Recombinant human growth hormone (HGH 191AA) dosing guide for the 10 IU compounded vial, with concentration calculations and reconstitution steps.

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Quickstart highlights

Recombinant human growth hormone (somatropin, 191 amino acids) is identical to endogenous pituitary GH.

  • Concentration: 10 IU/mL (10 IU vial + 1 mL bacteriostatic water).
  • At 10 IU/mL: 1 IU = 10 units, 2 IU = 20 units, 4 IU = 40 units on a U-100 syringe.
  • One 10 IU vial provides 10 daily doses at 1 IU or 2.5 doses at 4 IU daily.
  • Monitor fasting glucose weekly at doses ≥2 IU/day — HGH causes dose-dependent insulin resistance.
  • WADA-prohibited in sport; not approved for off-label wellness use by FDA.

Dosing table

For educational reference only. Your prescribing provider may adjust doses based on your clinical profile and response.

WeekDose (µg)UnitsFrequencyNotes
1-4—10Once daily (morning)1 IU — 10 units on U-100; conservative start for anti-aging protocol; one 10 IU vial provides 10 doses
5-8—20Once daily2 IU — 20 units; standard body composition dose; 5 doses per vial
9-16—30Once daily3 IU — 30 units; upper anti-aging dose; 3–4 doses per vial
17+—40Once daily4 IU — 40 units; performance protocol ceiling; 2.5 doses per vial

Gradual approach

WeekDose (µg)UnitsNotes
1-8—50.5 IU — 5 units; ultra-conservative start for women or older adults (>60); assess glucose tolerance
9-16—101 IU — advance only if fasting glucose unchanged from baseline

Reconstitution steps

  1. Draw 1 mL bacteriostatic water into a 3 mL syringe; inject slowly down the vial wall — do not inject directly onto the lyophilized pellet.
  2. Allow to dissolve naturally (do not shake); gently swirl if needed — 1–3 minutes.
  3. Final concentration: 10 IU/mL. At this concentration, 1 IU = 10 units on a U-100 syringe.
  4. Label with date and concentration; refrigerate at 2–8 °C immediately. Use within 28 days.

Supplies needed

8-week plan

  • 2 vials
  • 56 syringes
  • 2 mL bac water
  • 56 alcohol swabs

16-week plan

  • 6 vials
  • 112 syringes
  • 6 mL bac water
  • 112 alcohol swabs
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Protocol overview & cycle notes

Achieve GH-mediated body composition improvements (fat loss, lean mass gain) and anti-aging effects through precisely dosed daily subcutaneous HGH injections, starting at 1 IU and titrating based on IGF-1 response and glucose tolerance.

Cycle length: 16 weeks on.

Off-cycle: 4–8 weeks off per cycle; check IGF-1 and fasting glucose before resuming.

Storage & handling

Lyophilized: store in refrigerator at 2–8 °C before and after reconstitution. Reconstituted at 10 IU/mL: refrigerate 2–8 °C; use within 28 days. Do not freeze. HGH is more temperature-sensitive than peptide analogues — do not leave at room temperature for more than 30 minutes.

Injection & tracking tips

  • Inject subcutaneously on an empty stomach in the morning (pre-breakfast) for optimal GH/lipolysis synergy; alternatively, inject in the evening 2+ hours after last meal.
  • Use a short, fine-gauge needle: 29G–31G, 4–6 mm length for subcutaneous abdominal injection.
  • NEVER inject into a vein — strictly subcutaneous administration only.

Tracking

Logging helps you and your provider spot patterns and adjust dose or timing.

  • Check fasting glucose weekly for the first 8 weeks — HGH causes insulin resistance at doses ≥2 IU/day.
  • Measure IGF-1 at baseline and every 4 weeks — target upper-normal range for age (<250 ng/mL for adults over 40).
  • Track body composition (lean mass, body fat %) via InBody or DEXA every 8 weeks.
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How this works & references

Recombinant human growth hormone (somatropin, 191 amino acids) is identical to endogenous pituitary GH. It binds GH receptors in the liver (stimulating IGF-1 production), adipose tissue (lipolysis), and muscle (protein synthesis). FDA-approved under multiple brand names for GH deficiency, Turner syndrome, and HIV wasting. Off-label wellness use at 1–4 IU/day produces measurable IGF-1 elevation, improved lean body mass, and reduced visceral adiposity. GH biomarker testing can detect HGH use in anti-doping programs.

Sources

Frequently asked questions

What is the recommended dose of HGH for anti-aging versus bodybuilding?
Anti-aging and body composition protocols typically use 1–2 IU/day. Performance/bodybuilding protocols use 2–4 IU/day. Doses above 4 IU/day carry significantly higher risk of side effects (edema, carpal tunnel, glucose intolerance, acromegaly) and are not recommended for wellness use.
When is the best time to inject HGH?
Two protocols exist: (1) Morning fasted: amplifies the natural morning cortisol + GH synergy for lipolysis; (2) Before bed: mimics the physiological nocturnal GH pulse and maximizes anabolic effects during sleep. Morning is preferred for fat loss; evening for muscle recovery. Avoid injecting right before eating.
Can HGH cause diabetes?
HGH is a counter-regulatory hormone that opposes insulin action. At doses ≥2 IU/day, fasting glucose typically rises 5–15 mg/dL. In pre-diabetic individuals, this may unmask frank diabetes. Monitor fasting glucose weekly. Dose reduction or cycling resolves glucose elevation in most cases.
Is HGH 191AA the same as pharmaceutical somatropin?
Yes — 191AA refers to the 191 amino acid sequence of the full human GH protein, identical to Genotropin, Norditropin, and other FDA-approved brands. Compounded HGH 191AA should be sourced from licensed compounding pharmacies with verified purity and potency testing.
How long do results from HGH take to manifest?
IGF-1 elevation occurs within 1–2 weeks. Increased training recovery and sleep quality: 3–4 weeks. Meaningful body composition changes (fat loss, lean mass): 6–12 weeks. Skin and connective tissue improvements: 12–24 weeks of consistent use.

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This content is for informational purposes only and does not constitute medical advice. Consult a licensed healthcare provider before starting any peptide therapy. Dosing and protocols may vary by formulation and prescriber.

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