A synthetic peptide marketed for faster healing of tendons, muscle, ligaments, and the gut. Its reputation rests on consistent animal experiments, but only a handful of small human studies exist, so the benefits remain unproven. There is essentially no human safety data, an unresolved tumor-blood-supply concern, and a supply of frequently contaminated, unapproved products. Investigational; banned in sport. (Full Review)
| Marker | Target | Why |
|---|---|---|
| CBC | Within reference range, no unexplained shifts | Screen for infection or hematologic change |
| CMP | Within reference range | Liver and kidney function |
| Liver enzymes (ALT, AST) | Low-normal (often <25 U/L) | Detect hepatic stress from compound or contaminants |
| eGFR / creatinine | eGFR >90 mL/min/1.73m² | Confirm renal clearance capacity |
| hs-CRP | <1.0 mg/L | Detect systemic inflammation, including from endotoxin-contaminated product |
Cadence: Baseline, then around 4–8 weeks during a course, and again if use is repeated or extended.