GHRP-6 is a synthetic peptide that copies a natural hunger hormone to make the body release its own growth hormone; health-focused adults use it hoping to keep muscle and resilience with age. The hormone rise is reliable, but real-world benefits are unproven. Risks appear modest but poorly measured: related drugs impaired blood-sugar handling, caused strong hunger and were linked to swelling; no long-term human safety study exists. (Full Review)
| Marker | Target | Why |
|---|---|---|
| IGF-1 | Age- and sex-specific laboratory range | Expected to change; confirms effect, flags excess |
| Fasting glucose | 70–99 mg/dL | Safety check; rise reduces or stops use |
| HbA1c | 4.0–5.6% | Safety check; rise stops or changes use |
| Prolactin | Men 4–15 ng/mL; women 4–23 ng/mL | Safety check; marked rise stops use |
| Morning cortisol | About 6–19 µg/dL at 8 a.m. | Safety check; persistent rise changes use |
| PSA (men) | 0–4.0 ng/mL | Safety check; rise stops use, prompts evaluation |
Cadence: Baseline (fasting, morning, at least 24 hours after any injection); IGF-1, fasting glucose and prolactin at 6–8 weeks, then every 3 months during use and 4 weeks after stopping; HbA1c every 3 months; PSA every 6–12 months; morning cortisol if fatigue, sleep disturbance or weight gain appear