HGH (Somatropin)

Growth hormone itself. It bypasses the pituitary entirely, which explains both its power and its risk.

Evidence: AApproved what's this?
Grade A for deficiency. Enhancement in non-deficient adults is unsupported, and the risk outweighs the benefit.
Also known as: Somatropin · rhGH · 191AA GH · Genotropin, Omnitrope, Humatrope, Norditropin and others
Class: Recombinant human growth hormone. Approved prescription hormone.

The 30-second version

WhatThe 191-amino-acid hormone your pituitary makes, produced recombinantly.

Proven forGH deficiency in children and adults, plus several growth disorders and HIV wasting.

The honest catchWith no pituitary brake, you can overshoot. US law also restricts distribution for non-medical use.

What it is

Every other GH-axis compound in this guide nudges the pituitary to release more of its own growth hormone. HGH skips that step and puts the hormone straight into the blood. That makes it far more powerful than any secretagogue, and it can push levels well past anything the body would produce naturally. That’s where both the benefits and the dangers come from.

How it works

Direct action. Binds GH receptors and activates JAK2–STAT5 signalling.

Fat. Drives lipolysis, the breakdown of stored fat.

Liver → IGF-1. IGF-1 carries much of the growth and repair effect.

Muscle and bone. Supports protein building and bone density.

The cost. GH opposes insulin, so blood sugar and insulin resistance rise, especially at higher doses.

With no pituitary brake, the body’s own GH production is suppressed by feedback for as long as you use it.

What the research shows

It’s one of the most studied hormones in medicine. In deficiency, replacement reduces fat mass, increases lean mass, raises bone density, improves lipids and quality of life, and restores growth in children^1,3. Long-term surveillance shows that at proper doses glucose control stays largely stable, though it needs watching². In non-deficient adults, it produces some body-composition change alongside a consistent rise in side effects, and medical consensus is that the risks outweigh the benefits¹.

Replacing GH in deficiency is well supported. Using it for enhancement when you’re not deficient is not.

Evidence at a glance

Use	Grade	Best evidence	Main gap	Read
Adult GH deficiency	AApproved	Less fat, more lean, better bone and lipids^1,3	For the deficient	Proven
Childhood growth disorders	AApproved	Restores growth¹	Specialist care	Proven
Body composition, non-deficient	BHuman trials	Real effect, more side effects	Unapproved; banned in sport	Ill-advised
Anti-ageing, non-deficient	BHuman trials	Risk outweighs benefit¹	Not supported	Not recommended

Dosing: what has been reported

Prescription hormone with legal restrictions. Approved dosing is always guided by IGF-1 and supervised by a doctor. Community figures are listed only so you know how far they exceed replacement doses. Roughly 3 IU = 1 mg.

Setting	Figure	Route	Grade
Adult deficiency (approved)	Start ~0.2 mg/day (0.6 IU); 0.1–0.2 mg if over 60; adjust every 1–2 months to mid-normal IGF-1; maintenance often 0.4–0.5 mg/day	Subcutaneous, daily	A
Children (approved)	Per kg, e.g. GHD 0.024–0.034 mg/kg/day; Turner ~0.045–0.05 mg/kg/day	Subcutaneous, daily	A
HIV wasting (approved)	~0.1 mg/kg/day, max 6 mg/day	Subcutaneous	A
Off-label community	1–8 IU/day and higher; risk rises steeply above ~4 IU/day	Subcutaneous	D

Preparing & storing

GH is a large, fragile protein. Reconstitute with the supplied diluent following the product instructions, never shake it, keep it refrigerated and use it within the stated window. These rules are stricter than for small research peptides.

Reported side effects

Fluid retention and swelling (about a third of patients at higher doses)
Joint and muscle pain; carpal tunnel syndrome
Raised blood sugar and insulin resistance
Headaches, raised blood pressure, gynaecomastia
Uncommon but serious: pancreatitis, raised intracranial pressure; long-term cancer risk is debated

Interacts with insulin, corticosteroids, and thyroid and sex hormones. Medical monitoring covers IGF-1, glucose, insulin, thyroid, blood pressure and lipids.

Who should avoid it

Active or past cancer
Uncontrolled diabetes or significant insulin resistance
Acute critical illness (specifically contraindicated)
Pregnancy and breastfeeding; certain eye and intracranial conditions
Tested athletes: WADA prohibited, detectable

Regulatory status checked Oct 2026

Body	Status	Detail
FDA (US)	Approved, restricted	Distributing GH for anything other than an approved indication is a crime under US law.
EMA (EU)	Approved	Prescription only.
CDSCO (India)	Approved	Somatropin brands, prescription only.
WADA	Prohibited	Banned at all times; detectable.

The NexGen read

Real medicine for real deficiency

HGH is powerful and genuinely helpful for people who lack it. For everyone else, the side effects and the legal and sporting consequences outweigh the gains. If GH is the goal, start with testing and a doctor, not a vial.

References

Somatropin for growth hormone deficiency. StatPearls. NCBI Bookshelf NBK596750.
Beck-Peccoz P, et al. No increased risk of glucose metabolism disorders in adults with GHD on long-term biosimilar somatropin (Omnitrope). PMC6907272.
Molitch ME, Clemmons DR, Malozowski S, et al. Evaluation and treatment of adult GH deficiency: Endocrine Society guideline. J Clin Endocrinol Metab. 2011;96(6):1587–1609.