Side-by-side research comparison of HGH and MK-677 across our PubMed, ClinicalTrials.gov, and EuropePMC corpus. 5 head-to-head studies plus 36 on HGH and 57 on MK-677.
| HGH | MK-677 | |
|---|---|---|
| Drug class | growth hormone | n/a |
| Studies in corpus | 36 | 57 |
| Highest evidence tier | rct | rct |
| Evidence tier mix | rct · 8 other · 8 case series · 1 review · 3 case report · 2 preclinical animal · 3 in vitro · 2 | rct · 10 other · 10 review · 5 preclinical animal · 20 in vitro · 4 case report · 1 |
| Studies with explicit sample size | 6 | 8 |
| Head-to-head studies in corpus | 5 | |
Beyond the literature: here's what third-party Certificate-of-Analysis records (Janoshik, BCC, Auxlabs) say about real HGH and MK-677 batches we've tested. Aggregate, public data — cross-reference against the studies below.
We tested 415 HGH batches across 132 manufacturers, 96.71% avg purity.
We tested 68 MK-677 batches across 31 manufacturers, 98.6% avg purity.
We hold deeper lab coverage on HGH (415 batches tested). MK-677 edges ahead on average measured purity (96.71% vs 98.6%) — a narrow gap; weigh it against failed-batch and underdose counts above.
Studies in our corpus that mention both HGH and MK-677 — the gold-standard direct comparison evidence.
This review underscores the critical need for more robust, evidence-based interventions to address somatopause and its associated age-related conditions. The findings highlight that current GH therapy, despite its popularity, lacks sufficient scientific bac…
This comprehensive review underscores the broad therapeutic potential of GHS across multiple organ systems and conditions. The observed benefits, from cardioprotection and growth promotion to metabolic improvements and body composition changes, suggest GHS …
The discovery of capromorelin represents a significant advancement in the development of orally active Growth Hormone Secretagogues (GHSs). Its excellent bioavailability and oral activity directly address a major hurdle in GHS drug development, potentially …
Looking for vendor-level purity, endotoxin, and HPLC data on HGH or MK-677? TitrateLab tracks Certificate-of-Analysis records from the major peptide labs (Janoshik, BCC, Auxlabs) alongside the research above. Cross-reference vendor batches against the studies on this page.