Source comparison
Melanotan-1 Biomarkers: Detection Methods Comparison
Alpha-MSH (total) Immunoassay (ELISA) 4–12 hours post-dose >80 pg/mL (fasting) Cannot distinguish endogenous from exogenous; useful for aggregate melanocortin activity Not specific enough for melanotan-1 confirmation. Requires LC-MS for differentiation Melanot
This comparison does not assign a generated winner or score.
- Alpha-MSH (total)
- Immunoassay (ELISA)
- 4–12 hours post-dose
- >80 pg/mL (fasting)
- Cannot distinguish endogenous from exogenous; useful for aggregate melanocortin activity
- Not specific enough for melanotan-1 confirmation. Requires LC-MS for differentiation
- Melanotan-1 (intact peptide)
- LC-MS/MS
- 30–90 minutes post-dose
- >5 ng/mL plasma
- Direct peptide detection; impractical due to short half-life
- Gold standard for acute exposure but useless for pathway engagement after 2 hours
- Tyrosinase activity
- Spectrophotometric assay (tissue)
- 24–72 hours post-dose
- >2.5 nmol/mg protein/hr
- Functional marker of MC1R activation; requires biopsy
- Best receptor-level biomarker. Invasive but definitive for pathway engagement
- Urinary PTCA
- HPLC-UV
- 3–14 days post-dose
- >50 nmol/mg creatinine
- Long-term melanin synthesis marker; tracks cumulative effect
- Ideal for non-invasive longitudinal monitoring. Detects sustained melanogenesis
- MC1R receptor density
- Flow cytometry (skin cells)
- Baseline vs 48 hours
- >30% reduction from baseline
- Receptor internalization indicates prolonged occupancy
- Research-only method. Shows whether receptors are saturating but not clinically accessible