What Is HGH (Somatropin)?

HGH refers to somatropin, a recombinant form of human growth hormone produced through recombinant-DNA technology. It is a 191-amino-acid polypeptide (191aa) identical in sequence to the growth hormone the body produces naturally, and is one of the most widely studied compounds in growth, metabolic and recovery research. This listing is a lyophilised, research-grade “blue-top” presentation supplied for laboratory and research use only.

How HGH Works

Growth hormone exerts most of its downstream effects by stimulating the liver and peripheral tissues to produce insulin-like growth factor 1 (IGF-1), which mediates much of its activity in study models — including effects on protein synthesis, lipolysis and cellular growth pathways. Because native growth hormone is released in pulses and cleared quickly, research protocols study it as frequent subcutaneous administration. For related growth-factor research see IGF-1 LR3 1mg.

Product Details & Specifications

Compound: Somatropin (HGH, 191aa)
Presentation: 100 IU kit — 10 vials × 10 IU (blue-top lyophilised powder)
Per vial: 10 IU ≈ 3.33 mg somatropin (≈3 IU per mg)
Form: white lyophilised powder, reconstituted before use
Intended use: in-vitro / laboratory research only — not for human or veterinary use

Understanding IU, mg & the 100 IU Kit

Growth hormone is measured in international units (IU) rather than milligrams. The accepted conversion for somatropin is roughly 3 IU per 1 mg, so each 10 IU vial contains about 3.33 mg of peptide, and a full 100 IU kit = 10 vials. Knowing the IU-to-mg ratio is essential for accurate reconstitution maths in any research setting.

Half-Life & Frequency

Standard recombinant somatropin has a short circulating half-life of roughly 2–3.5 hours. Because it clears quickly and acts largely through IGF-1, clinical study protocols administered it as daily subcutaneous injections rather than infrequent dosing.

Reconstitution & Storage (Research Handling)

Lyophilised somatropin is stable when kept cold and dry. For reconstitution, laboratories use bacteriostatic water, added slowly against the vial wall (growth hormone is delicate — never inject diluent directly onto the powder or shake vigorously; swirl gently). Once reconstituted, keep refrigerated at 2–8°C and use within about 14–28 days. Do not freeze a reconstituted vial, and allow a cold vial to reach room temperature briefly before opening to avoid condensation.

Dosing in Research Context

The following is provided for research context only and is not a dosing recommendation. In published clinical literature, growth hormone was studied across a wide range of weekly IU-per-kilogram schedules, divided across several times per week, over extended periods — always under medical supervision. Any handling of this compound is the responsibility of the qualified researcher.

Reported Side Effects

In clinical research, growth hormone’s most commonly reported effects were dose-dependent and included fluid and water retention, carpal tunnel syndrome, joint and muscle aches, morning headaches, peripheral edema and changes in glucose handling (hypoglycemia). These are research observations, not a safety profile for any non-clinical use.

HGH & IGF-1

Because growth hormone works largely by raising IGF-1, the two are frequently studied together. Researchers pairing this compound with growth-factor work often reference IGF-1 LR3 1mg; metabolic-research peptides such as Tirzepatide 10mg are studied on separate pathways in the same catalogue.

Where to Buy HGH Online

KGEAR U.S supplies research-grade somatropin with discreet, tracked shipping and crypto checkout. Explore related growth-factor and metabolic compounds in our peptides collection. All products are sold strictly for research use only.

Frequently Asked Questions

How many IU is this kit?

A full 100 IU kit — 10 vials at 10 IU each (≈3.33 mg somatropin per vial).

What is “191aa” and “blue top”?

191aa refers to the full 191-amino-acid somatropin sequence; “blue top” is the vial-cap presentation commonly used for this form.

What purity is it?

What is the half-life?

Short — roughly 2–3.5 hours for standard recombinant somatropin, which is why it was studied as daily administration.

How is it reconstituted and stored?

With bacteriostatic water, added gently; then refrigerated at 2–8°C and used within about 14–28 days. Do not freeze once reconstituted.

How does HGH relate to IGF-1?

Growth hormone raises IGF-1, which mediates much of its downstream activity — the two are often studied together.

Is this for human use?

No. All products are supplied strictly for laboratory and research use only, not for human or veterinary consumption.

Disclaimer

This product is sold for laboratory and research use only. It is not a drug, food or supplement, is not intended to diagnose, treat, cure or prevent any disease, and is not for human or animal consumption. All mechanism, half-life and dosing information above summarises published research for scientific context only and is not medical advice. Handling of research compounds is the sole responsibility of the qualified purchaser.

Growth Hormone