Sermorelin is a lab-made copy of the first 29 amino acids of growth-hormone-releasing hormone, the brain's signal to release growth hormone. Its former FDA approvals covered injectable Geref, and those approvals were withdrawn in 2009 at the maker's request [7]. Today it is sold as a compounded drug, and some telehealth providers sell it as a tablet or spray. For what sermorelin is and its status, start with the sermorelin overview.
Oral benefits are unestablished; nasal studies are limited
Two separate questions hide inside "do sermorelin tablets work." The first is whether sermorelin taken by mouth reaches the blood intact. The second is whether, if it does, it raises growth hormone enough to matter. Our search did not identify a published human study answering these questions for tablets, troches or dissolving tablets [6].
The nasal route has older pharmacokinetic, pediatric growth and sleep studies with different results. The table separates their findings from the unanswered question about current tablets.
| Form | Human studies | What they found | Strength of evidence |
|---|---|---|---|
| Injection under the skin | Thorner 1996, 110 treated children; 86 in the efficacy analysis [8]; Vittone 1997, 11 older men [9] | Growth hormone rose; growth sped up in children with growth-hormone deficiency; a small older-men study found no DXA change; a separate HIV study found secondary body-composition differences | Moderate for growth hormone; very low for adult goals |
| Nasal spray | Wilton 1993, 30 men [10]; Hümmelink 1993, 8 children [11] | 3 to 5% absorbed versus IV; response faded over months; antibodies in 3 of 8 children | Low |
| Sublingual tablet or troche | None found [6] | Not tested | None |
| Orally dissolving tablet (ODT) | None found | Not tested | None |
| Swallowed tablet or capsule | None found | Not tested | None |
Studies of GHRH(1-29) are included because it is the same peptide sequence as sermorelin.
Non-injected sermorelin is sold as tablets, troches and sprays
Compounding pharmacies make sermorelin in forms that never went through FDA review. The ones sold by telehealth providers include orally dissolving tablets (ODTs), sublingual tablets or troches held in the mouth, and nasal sprays. The selected examples below have current product pages for non-injected forms; they are not a complete market inventory.
| Provider | Non-injected forms | What to compare |
|---|---|---|
| Strut Health | Sublingual lozenge | The review separates its printed 30-day refill offer from calendar-month costs [1] |
| AHBARx | Film strip, troche and sermorelin/glycine rapid-dissolve tablet | Separate products with monthly delivery labels; inspect the exact formula and plan [2] [3] [4] |
Selected product pages. Selling a form does not establish its absorption, efficacy or equivalence to an injection.
Selling a form isn't the same as having evidence for it. A provider should identify the exact product and study supporting its claims. Older nasal experiments are not trials of current tablets, troches or commercial sprays.
What did our search find for oral and sublingual forms?
Our review of PubMed records for sermorelin with oral, tablet, sublingual, troche or buccal in the title or abstract did not identify an eligible human treatment trial [6]. A broader search on growth-hormone-releasing hormone given by mouth or under the tongue also requires distinguishing another drug taken by mouth from injected sermorelin. A limited search can miss differently indexed or unpublished work; it is not proof that no experiment exists.
Formulation matters as much as the ingredient name. In an original study of oral semaglutide, human and dog experiments found localized stomach absorption that required coformulation with the enhancer SNAC; the mechanism was compound-specific [14]. This illustrates why a successful oral formulation cannot validate a different peptide or pharmacy preparation. It does not measure the absorption of sermorelin through the lining of the mouth, which also differs from swallowing a tablet.
Some growth-hormone drugs do work by mouth, but they are different molecules
Some pages argue that if other growth-hormone boosters work as pills, sermorelin tablets must too. The drugs they mean are small synthetic peptides built for the purpose. In a 1995 study, swallowed GHRP-6, a six-amino-acid peptide, raised growth-hormone peaks in 7 children with short stature, to 18.8 µg/L from 1.1 µg/L at baseline [13].
Sermorelin is a 29-amino-acid fragment of a natural hormone, a different kind of molecule. A result for GHRP-6 tells you nothing about how sermorelin behaves in the gut.
Older nasal studies measured low absorption and some hormone responses
In 30 healthy men aged 19 to 43, the same peptide sequence given as a nasal spray reached the blood at only 3 to 5% of the level of an IV injection [10]. Large nasal doses did trigger growth-hormone release, so the spray wasn't inert. The study also found sustained hormone responses with repeated intranasal exposure and supported further investigation. Low bioavailability does not by itself establish whether a particular clinical outcome improves, and these experiments do not validate a current commercial spray.
A pediatric pilot raised different concerns. In a 6-month pilot in 8 children with growth-hormone deficiency, growth-hormone peaks after each spray shrank by week 6 in most children and shrank further by month 6. Three children developed antibodies to the peptide, most had sneezing, a runny nose or mild burning, and 2 stopped treatment. A lower-leg growth measure improved at six weeks and then declined; overall six-month height velocity did not increase, and the authors concluded the spray was "not suitable in its present form" [11].
A third study, in 12 young and 11 older healthy men, gave nasal growth-hormone-releasing hormone 30 minutes before bed. It increased deep sleep and REM sleep but reduced the usual rise in growth hormone early in the night [12]. The abstract calls the drug "GHRH" without saying which fragment, so treat it as a related form.
No direct tablet-versus-injection human comparison was identified
Our search did not identify a direct human comparison of a sermorelin tablet and an injection. Published human studies include injectable and intranasal GHRH(1-29); these do not validate a tablet. In an open-label study treating 110 children with growth-hormone deficiency, 86 were eligible for the efficacy analysis. Their height velocity rose to 3.1 inches (8.0 cm) a year at 6 months, from 1.6 inches (4.1 cm) before treatment [8]. In 11 healthy men aged 64 to 76, 6 weeks of nightly injections raised nighttime growth hormone but left IGF-1, weight and DXA body composition unchanged. Two of six strength measures and an abdominal-endurance measure improved, but this small before-and-after study had no placebo group [9].
So even the injected form has thin evidence for the adult goals it's marketed for. That verdict is covered in does sermorelin work, and the timing studies are in when to take sermorelin.
Other injected GHRH(1-29) studies should not be ignored. In a randomized 12-week Geref study of 31 men with HIV lipodystrophy, IGF-1 was the primary endpoint; secondary DXA measures favored treatment for lean mass and trunk fat, while the visceral-fat comparison was not statistically significant [5]. This specific disease population and injected preparation cannot establish benefits from a commercial tablet.
What to ask a provider that sells a non-injected form
- What published evidence do you rely on for this form, as opposed to the injection?
- Will you check IGF-1 before I start and again later, so we can see whether anything changed?
- Which pharmacy compounds it, and is that pharmacy a 503A or a 503B facility?
- If my levels don't move, can I switch to the injection without starting a new plan?
Clear answers help document the evidence gap; they do not establish effectiveness. For the safety side, see is sermorelin safe. For its approval history, see is sermorelin FDA-approved. How these pages are sourced is on how we check.
What each form costs
Ask for the exact formulation, amount supplied, recurring charge and payment interval. A 30-day refill, calendar-month subscription and prepaid multi-month plan are different commitments. The selected provider reviews above distinguish their currently printed offers from prices that need a written quote. A lower price does not establish absorption or a clinical benefit, and an increase in IGF-1 alone does not prove better sleep, strength or recovery.