Education only · provider review required
Research pathway · 01
Growth-hormone pathway peptides, explained
Several peptides are studied for how they interact with the body's own growth-hormone signalling — the pituitary, the hypothalamus and the hormones that regulate them. This page explains that research context in plain language and lists the peptides discussed in it.
Free · about 10 minutes · reviewed by a licensed physician
What people are usually asking
People usually arrive here from one of three questions: they have read that growth-hormone levels decline with age and want to understand what that means; they have seen names like sermorelin or ipamorelin and want to know how they differ from growth hormone itself; or a clinician has mentioned a "secretagogue" and they want a plain-language explanation before a conversation.
The short version: these peptides are studied for their effect on the body's own signalling rather than as replacement hormone. That distinction matters for how the research is designed and for what a provider can and cannot responsibly say.
Peptides discussed in this context
Listed for education. Inclusion is not a recommendation, and none of these is an FDA-approved treatment for the question above.
Sermorelin · Research Overview & Provider Discussion Guide
GHRH analogue · pituitary signalling
Human data from former paediatric approval · not approved for adult use
Read the page → 02CJC-1295 · Research Overview & Provider Discussion Guide
Long-acting GHRH analogue
Human pharmacology studies · Not an FDA-approved drug for this use
Read the page → 03Ipamorelin · Research Overview & Provider Discussion Guide
Selective GH secretagogue
Human hormone-response studies · Not an FDA-approved drug for this use
Read the page → 04GHRP-2 · Research Overview & Provider Discussion Guide
GH-releasing peptide
Studied as a diagnostic / research tool · Not an FDA-approved drug for this use
Read the page → 05GHRP-6 · Research Overview & Provider Discussion Guide
GH-releasing peptide
Research-tool literature · Not an FDA-approved drug for this use
Read the page → 06Tesamorelin
GHRH analogue · FDA-approved for HIV lipodystrophy
FDA-approved for one indication · other uses off-label
Read the page → 07CJC-1295 vs Sermorelin
CJC-1295 vs sermorelin
Comparison page · education only
Read the page →Where the evidence stands
Sermorelin has the longest history: it was FDA-approved for a paediatric diagnostic and treatment use and later withdrawn from the market for commercial reasons, so there is a body of human pharmacology data, but not approval for the questions adults typically ask. CJC-1295 and ipamorelin have human pharmacokinetic and hormone-response studies but no approval for any use. GHRP-2 and GHRP-6 were studied mainly as research tools and diagnostics.
What none of these have is an approved indication for healthy adults, and the long-term safety data in that population is limited. A responsible provider will tell you that before anything else.
Status reflects published research context only and is not a statement of safety, efficacy, or suitability for any person.
Questions worth bringing to a provider
The intake is where individual questions belong. These are the ones that tend to make that conversation useful.
- Is there anything in my history — thyroid, pituitary, cancer history, sleep apnoea — that changes whether this pathway is relevant to me?
- What would you want to measure before, and how often after?
- What is known about long-term safety in adults, and what is not?
- What would make you say no?
What happens if you start an intake
You leave Vitrex for Doctor G Medical's secure portal, complete a confidential intake (about 10 minutes, free), and a licensed provider reviews it. If growth-hormone-pathway questions are relevant to your history, the provider may discuss options; if not — or if your state restricts them — they say so. Nothing is charged before a written quote.
Frequently asked questions
Are these the same as growth hormone?
No. Growth hormone (somatropin) is the hormone itself and is a prescription drug with specific approved uses. The peptides on this page are studied for how they affect the body's own release of growth hormone. They are different molecules with different research histories.
Is sermorelin FDA approved?
Sermorelin was approved for a specific paediatric use and was later discontinued by the manufacturer. It is not approved for adult wellness or anti-ageing purposes. Any use today is off-label and is a provider's decision.
Can I read about dosing here?
No. Vitrex does not publish dosing, schedules or protocols for any peptide. Those decisions belong with a provider who knows your history.
Next step
Next step: a 3-minute confidential intake, reviewed by a licensed provider. No treatment is promised or implied.
Free · about 10 minutes · reviewed by a licensed physician
General education · Not medical advice · Provider approval required