HGH Forms Compared: Injections, Secretagogues, and "HGH Supplements"
Three quite different products get sold under the growth-hormone heading. Recombinant HGH (somatropin) is actual growth hormone, given by injection, available on prescription for approved indications — the clinical reference point. Growth hormone secretagogues are separate compounds that stimulate the pituitary to release more of its own GH rather than supplying it; most are unapproved research compounds. Over-the-counter "HGH supplements" and oral sprays generally contain no growth hormone at all, and typically supply amino acids marketed as precursors. These are not three strengths of the same thing; they are three different propositions with three different evidence bases.
Recombinant HGH (somatropin)
This is growth hormone itself, produced recombinantly and administered by injection. It is a prescription medicine with approved indications, a documented adverse-effect profile, and required monitoring. It is the only one of the three that is unambiguously growth hormone.
Growth hormone secretagogues
Secretagogues do not supply growth hormone. They act on the pituitary to increase its own release, which is a meaningfully different intervention — it works within the body's existing regulatory feedback rather than overriding it, and it depends on the pituitary being able to respond.
Most compounds in this group are unapproved research chemicals. That they measurably raise GH is generally the strongest claim available for them; that this produces a worthwhile clinical outcome is the step that is usually assumed rather than demonstrated.
Over-the-counter "HGH supplements"
Products sold as HGH pills, sprays or "releasers" in shops and online generally contain no growth hormone. Growth hormone is a large peptide and would not survive digestion intact in any case, which is why the actual medicine is injected. These products typically supply amino acids described as precursors.
The naming is the problem. A product called an "HGH supplement" that contains no HGH is trading on a similarity of name rather than of content, and a reader comparing it to injectable somatropin is not comparing like with like.
| Category | Contains GH? | Route | Regulatory status |
|---|---|---|---|
| Recombinant HGH (somatropin) | Yes | Injection | Prescription medicine |
| Secretagogues | No — stimulates release | Usually injection | Mostly unapproved research compounds |
| OTC "HGH supplements" | Generally no | Oral / spray | Sold as dietary supplements |
Frequently asked questions
This article distinguishes three categories. It does not recommend any of them, name individual secretagogue compounds, or give dosing for anything. Several specific secretagogues have been studied and would each need assessing on their own evidence — that per-compound review is deliberately not attempted here, so treat the absence of names as a scope limit rather than a verdict. The table describes what each category IS, not how well any of it works. One legal point carries across all three: in the United States, distributing actual growth hormone for non-approved uses is a federal offence under 21 U.S.C. § 333(e), and that statute covers somatrem, somatropin and their analogues — it does not reach compounds that merely stimulate your own release.
Part of the HGH & Growth Hormone Guide.