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HGH 191AA — 24mg

191-AA Protein / Native GH Sequence

HGH 191aa is a 191-amino-acid recombinant protein identical in sequence to endogenous human growth hormone, carrying an extensive body of indexed research literature, with 54,126 PubMed records to date including 275 clinical studies.

$199.00

Human Growth Hormone (HGH / Somatropin) is the 191-amino acid recombinant form of endogenous pituitary-derived growth hormone. It stimulates IGF-1 production in the liver, drives protein

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SKU: LL-HGH191-24 Category:

PubMed Literature Index

54126

studies indexed in the public literature

Q2 2026 · view PubMed search ↗

44644
Human
50101
Animal
275
Clinical Trials
0
EU Trials

Overview

Studies describe HGH 191aa not as a secretagogue that stimulates the pituitary to produce growth hormone, but as growth hormone itself, directly replacing the endogenous hormone. In the literature, this is characterized as binding growth hormone receptors throughout the body immediately and completely, bypassing hypothalamic-pituitary regulatory control. Researchers discuss this direct-binding mechanism as distinct from secretagogue-based approaches, noting its association in the literature with supraphysiological receptor engagement, axis suppression, and dose-dependent effects not reported for secretagogues.

Chemical & Molecular Properties

FormulaC990H1528N262O300S7
Mol. Weight22124.1 g/mol

Key Areas of Research Interest

  • Investigated in the context of direct growth hormone receptor binding and activation
  • Studied for its bypass of hypothalamic-pituitary regulatory feedback relative to GH secretagogues
  • Investigated in the context of anabolic signaling associated with growth hormone receptor engagement
  • Studied for dose-dependent physiological responses linked to supraphysiological GH exposure
  • Subject of a large indexed literature base spanning human, animal, and clinical research

FAQ

What is HGH 191aa commonly researched for?

HGH 191aa is studied in the literature as recombinant human growth hormone itself, with research examining its direct engagement of growth hormone receptors throughout the body and its distinction from secretagogue-based approaches to GH stimulation, across a body of 54,126 indexed PubMed records including 275 clinical studies. It is sold strictly for laboratory research use, not for human or animal consumption.

Is HGH 191aa FDA-approved?

No. Sold for laboratory research use only, not FDA-approved, not for human or veterinary consumption.

How is HGH 191aa stored?

Lyophilized and frozen, protected from light; refrigerated after reconstitution for research use.

What purity standard does Legendary Labz hold HGH 191aa to?

Every lot of HGH 191aa is independently third-party tested to verify purity and identity before release.

Is a Certificate of Analysis available for HGH 191aa?

Certificates of Analysis for HGH 191aa are published per lot as testing completes, and Legendary Labz is Sourced in the USA.

Materials referenced on this page are intended for laboratory research purposes. No claims regarding therapeutic efficacy are made or implied. Not for human or veterinary use. Not evaluated by the FDA. Must be 21+.

Description

Overview

Human Growth Hormone (HGH / Somatropin) is the 191-amino acid recombinant form of endogenous pituitary-derived growth hormone. It stimulates IGF-1 production in the liver, drives protein synthesis, lipolysis, and cell regeneration throughout the body. Genuine 191aa HGH is chemically identical to pituitary HGH, distinguishing it from 192aa variants (which carry an extra methionine residue and can provoke antibody formation). Clinical applications include GH deficiency, muscle-wasting conditions, and short stature syndromes. In research and performance contexts, HGH is used for body recomposition, accelerated recovery, skin rejuvenation, and longevity. Requires proper cold-chain handling, heat degrades activity rapidly.

Structure & Chemistry

  • Molecular formula: C₉₉₀H₁₅₂₈N₂₆₂O₃₀₀S₇
  • Category: HORMONE / ANABOLIC / ANTI-AGING
  • Molecular size: ~22 kDa (191 amino acid protein hormone)

Regulatory & Research Status

  • FEDERAL LAW: Distribution of HGH for any use other than FDA-approved indications is a federal crime under 21 USC §333(e), punishable as a felony. FDA-approved indications: pediatric GHD, adult GHD, Turner syndrome, Prader-Willi, HIV wasting, short bowel syndrome, SHOX deficiency. Off-label distribution is criminal, not merely regulatory.
  • WADA: Prohibited S2 (Peptide Hormones), specific blood and urine detection test exists (isoform assay + biomarkers). Most other peptides have no validated detection test; HGH does.
  • Evidence tier: Extensive clinical data for FDA-approved indications. Body recomposition/anti-aging use in healthy adults has evidence but is legally off-label and carries federal distribution risk.

Specifications

Presentation 24mg single vial
Purity >99% by HPLC
Form Lyophilized powder (reconstitute with bacteriostatic water for laboratory use)
Category HORMONE / ANABOLIC / ANTI-AGING
For laboratory and research use only. Not for human or animal consumption. Not approved by the FDA for any therapeutic use. No claims regarding therapeutic efficacy are made or implied. Must be 21 or older.

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Overview

Human Growth Hormone (HGH / Somatropin) is the 191-amino acid recombinant form of endogenous pituitary-derived growth hormone. It stimulates IGF-1 production in the liver, drives protein synthesis, lipolysis, and cell regeneration throughout the body. Genuine 191aa HGH is chemically identical to pituitary HGH, distinguishing it from 192aa variants (which carry an extra methionine residue and can provoke antibody formation). Clinical applications include GH deficiency, muscle-wasting conditions, and short stature syndromes. In research and performance contexts, HGH is used for body recomposition, accelerated recovery, skin rejuvenation, and longevity. Requires proper cold-chain handling, heat degrades activity rapidly.

Structure & Chemistry

  • Molecular formula: C₉₉₀H₁₅₂₈N₂₆₂O₃₀₀S₇
  • Category: HORMONE / ANABOLIC / ANTI-AGING
  • Molecular size: ~22 kDa (191 amino acid protein hormone)

Regulatory & Research Status

  • FEDERAL LAW: Distribution of HGH for any use other than FDA-approved indications is a federal crime under 21 USC §333(e), punishable as a felony. FDA-approved indications: pediatric GHD, adult GHD, Turner syndrome, Prader-Willi, HIV wasting, short bowel syndrome, SHOX deficiency. Off-label distribution is criminal, not merely regulatory.
  • WADA: Prohibited S2 (Peptide Hormones), specific blood and urine detection test exists (isoform assay + biomarkers). Most other peptides have no validated detection test; HGH does.
  • Evidence tier: Extensive clinical data for FDA-approved indications. Body recomposition/anti-aging use in healthy adults has evidence but is legally off-label and carries federal distribution risk.

Specifications

Presentation 24mg single vial
Purity >99% by HPLC
Form Lyophilized powder (reconstitute with bacteriostatic water for laboratory use)
Category HORMONE / ANABOLIC / ANTI-AGING
For laboratory and research use only. Not for human or animal consumption. Not approved by the FDA for any therapeutic use. No claims regarding therapeutic efficacy are made or implied. Must be 21 or older.