Comparison
Hexarelin vs Testosterone
Side-by-side of Hexarelin and Testosterone. Every row below is pulled from the compound schema and will update as our data grows. For deeper reads, follow through to each compound page.
Hexarelin
Hexarelin peptide is a ghrelin-receptor hexapeptide. Largest acute GH pulse in the GHRP class, highest cortisol and prolactin lift, CD36 cardioprotective sign.
Testosterone
Testosterone replacement therapy for hypogonadism: TRAVERSE 2023 cardiovascular data, cypionate dosing, body composition gains, Schedule III status.
Effects at a glance
Hexarelin
- •Synthetic hexapeptide GHS-R1a agonist; produces the largest acute GH pulse of the synthetic GHRP class
- •Independent CD36 signaling produces cardioprotective effects in rodent ischemia models, GH-independent
- •Pronounced tachyphylaxis: GH response attenuates over 2 to 4 weeks of daily dosing
- •More cortisol and prolactin elevation than GHRP-2 or ipamorelin
- •Anecdotal protocols use 100 to 200 mcg subcutaneously 1 to 2 times daily for 2 to 4 week pulses
- •Banned by WADA under S2; advanced through phase 2 trials but never reached registration
Testosterone
- •Primary androgen; FDA approved for hypogonadism with confirmed deficiency and symptoms
- •Testosterone Trials (2016) showed sexual function and bone density improvements in older hypogonadal men
- •TRAVERSE 2023 (n=5,246) found non-inferiority on MACE versus placebo, with higher AF and PE rates
- •Schedule III controlled substance in US; WADA banned in sport
- •Aromatizes to estradiol; converts to DHT via 5-alpha reductase; both metabolites matter clinically
- •Erythrocytosis (HCT above 54%) affects 5 to 25% of users and is the most common dose-limiting effect
Side-by-side
| Attribute | Hexarelin | Testosterone |
|---|---|---|
| Category | peptide | hormone |
| Also known as | Examorelin, EP-23905, His-D-2-methyl-Trp-Ala-Trp-D-Phe-Lys-NH2 | TRT, testosterone replacement therapy, testosterone cypionate, testosterone enanthate, Androgel, Testim |
| Half-life (hr) ↗ | 1 | 192 |
| Typical dose (mg) ↗ | 0.1 | 150 |
| Dosing frequency | 1-2x daily | weekly to twice-weekly (cypionate/enanthate IM or SC); daily (topical, oral); every 3 to 6 months (pellet) |
| Routes | subcutaneous, intranasal, intravenous | intramuscular, subcutaneous, topical, buccal, subcutaneous (pellet), oral |
| Onset (hr) | 0.25 | 24 |
| Peak (hr) | 0.5 | 72 |
| Molecular weight | 887.04 | 288.42 |
| Molecular formula | C47H58N12O6 | C19H28O2 |
| Mechanism | Hexapeptide agonist of GHS-R1a producing acute GH release with cortisol and prolactin co-elevation. Independent CD36 binding produces GH-independent cardioprotective signaling in preclinical models. | Androgen receptor agonist driving anabolic gene transcription in muscle, bone, brain, and androgen-sensitive tissue. Aromatized to estradiol and 5-alpha-reduced to DHT, both with distinct downstream effects. |
| Legal status | Not FDA approved; advanced through phase 2 trials in EU but never registered; research-use-only grey market; banned by WADA | Schedule III controlled substance (US); WADA banned |
| WADA status | banned | banned |
| DEA / Rx | Not scheduled (research chemical) | Schedule III |
| Pregnancy | Insufficient data; not recommended | Category X; contraindicated in pregnancy (virilizing effect on female fetus) |
| CAS | 140703-51-1 | 58-22-0 |
| PubChem CID | 3037387 | 6013 |
| Wikidata | Q5743550 | Q150726 |
Safety profile
Hexarelin
Common side effects
- water retention
- vivid dreams
- head pressure or flushing
- transient lethargy
- tingling at injection site
- moderate hunger
Contraindications
- pregnancy
- active malignancy
- history of pituitary tumor
- uncontrolled diabetes
- prolactin-sensitive states
Interactions
- CJC-1295: synergistic GH release; accelerates tachyphylaxis if used continuously(minor)
- sermorelin: additive GH release via parallel GHRH and ghrelin pathways(minor)
- insulin: sustained GH can blunt insulin sensitivity over weeks(moderate)
- corticosteroids: amplify cortisol load; blunt GH response(moderate)
Testosterone
Common side effects
- erythrocytosis
- acne
- oily skin
- fluid retention
- increased body hair
- fertility suppression
- injection-site reactions
Contraindications
- active prostate cancer
- active breast cancer
- untreated severe sleep apnea
- untreated severe BPH
- uncontrolled heart failure
- polycythemia at baseline
Interactions
- warfarin: may potentiate anticoagulant effect; monitor INR(moderate)
- insulin: may improve insulin sensitivity; monitor glucose in diabetics(moderate)
- 5-alpha reductase inhibitors (finasteride): blocks DHT conversion; reduces some androgen effects(moderate)
- aromatase inhibitors (anastrozole): lowers estradiol; risk of over-suppression(moderate)
Which Should You Take?
Testosterone comes out ahead for most readers on the criteria we weight: 3 catalogued goals, controlled substance, oral dosing, with a Tier-A outcome catalogued. Hexarelin is the right call when one of the conditionals below applies.
- → If your priority is growth-hormone axis, pick Hexarelin.
- → If your priority is post-training recovery, pick Hexarelin.
- → If your priority is hormonal optimization, pick Testosterone.
- → If your priority is sexual function, pick Testosterone.
Edge case: If you cannot self-administer injections, Testosterone is the only oral option in this pair.
Default choice: Testosterone. Wider use case, a Tier-A evidence outcome catalogued, and broader goal coverage. Reach for Hexarelin only if your priority sits squarely in the goals it owns above.
This verdict is generated from each compound's schema (goals, legal status, evidence outcomes, dosing route). It updates automatically as our compound data evolves; the deeper read sits on each individual compound page.
Common questions
What is the difference between Hexarelin and Testosterone?
Hexarelin and Testosterone differ in category (peptide vs hormone), mechanism, and typical dosing. See the side-by-side table for full details.
Which has a longer half-life, Hexarelin or Testosterone?
Hexarelin half-life is 1 hours; Testosterone half-life is 192 hours.
Can you stack Hexarelin with Testosterone?
Stack compatibility depends on mechanism overlap, legal status, and individual response. Check each compound page for specific interactions and contraindications before combining.
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