Side-by-side comparison of mechanisms, dosing, interactions, and stacking potential.
| Hexarelin | MOTS-c | |
|---|---|---|
| Category | Peptides | Peptides |
| Standard Dose | Research indicates 100-200 mcg administered 1-2 times daily via subcutaneous injection. | Research indicates 5-10 mg administered 3-5 times per week via subcutaneous injection. |
| Timing | On empty stomach, bedtime preferred. Avoid prolonged continuous use due to rapid desensitization. | Morning administration preferred. Can be dosed pre-workout for enhanced exercise performance. |
| Cycle Duration | 4-8 week cycles maximum, then 4+ week break. Hexarelin desensitizes faster than other GHRPs. | 8-16 week cycles. |
| Evidence Level | moderate_human | Emerging (strong preclinical) |
Hexarelin (Examorelin) is a synthetic hexapeptide GHS-R1a agonist and the most potent synthetic GH secretagogue by peak GH release. It stimulates GH release through both pituitary ghrelin receptors and hypothalamic pathways, with mechanisms involving regulation of GHRH and somatostatin. Hexarelin also demonstrates significant cardiac benefits through activation of cardiac GHS-R1a receptors, protecting against ischemia-reperfusion injury and reducing cardiac fibrosis via the CD36 scavenger receptor pathway.
Research indicates 100-200 mcg administered 1-2 times daily via subcutaneous injection.
On empty stomach, bedtime preferred. Avoid prolonged continuous use due to rapid desensitization.
4-8 week cycles maximum, then 4+ week break. Hexarelin desensitizes faster than other GHRPs.
MOTS-c is a 16-amino acid mitochondrial-derived peptide encoded by the 12S rRNA gene of the mitochondrial genome. It primarily acts through the folate-AICAR-AMPK pathway: by regulating the folate cycle and de novo purine biosynthesis, it increases AICAR accumulation, which phosphorylates and activates AMPK. This enhances glucose uptake in skeletal muscle, improves insulin sensitivity, and mimics exercise-mediated physiological responses. Skeletal muscle MOTS-c levels increase 11.9-fold in response to acute exercise in young men.
Research indicates 5-10 mg administered 3-5 times per week via subcutaneous injection.
Morning administration preferred. Can be dosed pre-workout for enhanced exercise performance.
8-16 week cycles.
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