Research chemicals only—For laboratory research use only. Not for human consumption, therapeutic, or diagnostic purposes.
    Optimized Aminos
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    97.6% Purity
    HGH 191aa — research peptide vial, third-party tested 1
    Finished Optimized Aminos 3ml vials on the line

    ✓ HPLC + MS third-party tested

    ✓ Ships from the USA in 1–3 business days

    ✓ Public COA — no request needed

    Finished Optimized Aminos vials with lyophilized cake, capped and moving along the line

    Sealed and capped — one compound per vial

    HGH 191aa

    For research use only

    SKU HGH36-SECRET · Purity 97.6%

    97.6% Purity
    $50.00per vial
    Compare at $65.00Save 23%
    Ships from the USA in 1–3 business days
    In Stock(20 available)

    Kit & Save

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    • ✓Free US shipping on orders $100+ · ships in 1–3 business days
    • ✓Free Shipment Protection — lost or damaged in transit, we replace it, no return needed
    • ✓Free Bacteriostatic Water on orders $50+
    • ✓30-day replacement guarantee on unopened vials
    • ✓Tested by Janoshik Analytical — HPLC + Mass Spectrometry

    Researchers also added

    Certificate of Analysis (COA)

    Every batch is independently tested by a third-party US lab for HPLC purity and mass-spec identity.

    View third-party COA for HGH 191aa

    Research-grade human growth hormone, 36 IU per vial. Lyophilized powder for laboratory reconstitution. For research use only — not for human consumption.

    Also known as: Somatropin, rHGH

    For laboratory research use only. Not for human or animal consumption.

    A new standard for peptide manufacturing

    For research use only

    Step 01

    Sourcing

    Vetted manufacturing partners under documented synthesis controls — not anonymous overseas resellers repacking unknown stock.

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    Research dossier

    CompoundHGH 191aa
    Amountvial
    Purity97.6%
    Vial size3 ml
    FormLyophilized powder
    StorageStore cool, dry, away from light
    TestingThird-party tested (HPLC + MS)
    AvailabilityIn Stock
    SKUHGH36-SECRET

    For laboratory research use only. Not for human, veterinary, or diagnostic use.

    Frequently Asked Questions

    For Research Use Only
    Research Use Only: All information below describes in-vitro laboratory findings. HGH 191aa is not an FDA-approved drug and is not intended for human consumption, therapeutic, or diagnostic use.

    HGH 191aa (SKU HGH36-SECRET) is independently HPLC and mass-spectrometry tested to 97.6%. A third-party tested Certificate of Analysis is published publicly on this product page — no request required.

    The third-party tested COA for HGH 191aa is published on this product page. Email email support with your order number if you need the full PDF.

    US orders ship within 1–3 business days from our domestic facility via USPS or UPS, with standard transit of 2–4 business days. Packaging is plain and unbranded.

    Unopened, factory-sealed vials may be eligible for return under the posted refund policy. Contact support with your order number before mailing any product back.

    No. HGH 191aa is sold strictly for in-vitro laboratory research and educational use only. It is not an FDA-approved drug and is not intended for human consumption, therapeutic, or diagnostic purposes.

    HGH 191aa is supplied lyophilized. Reconstitute with bacteriostatic water at your target concentration — our free peptide reconstitution calculator (linked from the menu) computes the exact reconstitution volume for your target concentration. Swirl gently; do not shake. Store the reconstituted vial refrigerated (2–8°C) and use within ~30 days.

    Optimized Aminos manufactures and ships HGH 191aa from a US facility. Every vial is third-party HPLC and mass-spectrometry tested to 97.6% purity, and orders leave our warehouse within 1–3 business days.
    Selected Size
    97.649%

    Purity

    VariantHGH 36 IU
    TestedFeb 4, 2026
    View COA

    Quality, verified three ways

    HPLC area % · MS identity

    Chromatographic purity is reported as HPLC area percent, and identity is confirmed by mass spectrometry matching the expected molecular weight. Every result is published as a third-party tested COA.

    Related research reading

    Background articles from our research library for HGH 191aa. For laboratory research context only.

    RESEARCH CHEMICALS ONLY

    This product is intended for laboratory research use only. Not for human consumption, therapeutic, or diagnostic purposes. Not an FDA-approved drug.

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