A copper-carrying peptide with a strong laboratory story but a thin human signal. It is best viewed as a plausible add-on to established hair treatments, not a proven stand-alone regrowth treatment, since its independent effect on hair remains genuinely uncertain. Safety is reassuring for topical use, with mostly mild, reversible local effects. (Full Review)
| Marker | Target | Why |
|---|---|---|
| Serum ferritin | ~50–100 ng/mL | Iron stores; low ferritin contributes to hair shedding and can mask treatment benefit |
| Serum copper & ceruloplasmin | Mid-normal range | Confirms copper status is adequate and screens for copper-handling disorders before sustained or invasive use |
| TSH | ~0.5–2.5 mIU/L | Thyroid dysfunction is a common reversible cause of hair loss that can confound results |
| Vitamin D (25-hydroxyvitamin D) | ~40–60 ng/mL | Low vitamin D is associated with hair-cycle disruption and is worth correcting alongside treatment |
| Total & free testosterone, DHEA-S | Sex- and age-appropriate mid-range | Relevant when androgen-driven hair loss is suspected or anti-androgen co-therapy is considered |
Cadence: Standardized scalp photography at baseline, then roughly 3 months, 6 months, and every 6–12 months