Pigmentation

Gray hair

Age-related loss of hair-shaft pigment from melanocyte stem-cell decline and follicular oxidative stress

Metabolic-syndrome / obesity control

Smoking cessation

Autologous melanocyte / follicle stem-cell micro-transplant & mobilization

Stem-cell factor (SCF)/KIT signaling to recruit & maintain melanoblasts

Immunomodulator / anti-inflammatory drug-induced repigmentation

Topical minoxidil for gray-hair repigmentation

Imatinib & tyrosine-kinase inhibitors (off-target hair repigmentation)

Vitamin B12 (cobalamin) & folate correction

Screen-and-correct a documented micronutrient deficiency (vitamin D, calcium, ferritin, B12)

Iron / ferritin repletion

Screen and correct thyroid dysfunction

Lower follicular oxidative burden (diet quality + scalp photoprotection)

Chronic-stress reduction (sympathetic / HPA axis)

Drug-repurposing repigmentation signals (medication-induced hair darkening)

Topical minoxidil for white-hair repigmentation (Phase 4 RCT)

Platelet-rich plasma (PRP) growth-factor signaling to the follicular niche

Endothelin-3 (EDN3)/EDNRB signaling to expand melanoblasts & precursors

MSC-derived exosome / secretome therapy

iPSC / pluripotent-derived melanocyte precursor grafts

Melanocyte stem-cell reactivation & Wnt/β-catenin niche signaling

Wnt/β-catenin (GSK-3β) activation to mobilize McSCs from bulge to hair germ

GR-7 topical anti-gray lotion

Phototherapy & laser (PUVA, UVB, low-level laser) for repigmentation

Prostaglandin analogs (latanoprost / bimatoprost) for hair pigmentation

Topical pseudocatalase (PC-KUS) & liposomal catalase — follicular H₂O₂ removal

Oral antioxidants (catalase / glutathione / selenium+E) vs. follicular H₂O₂

Copper (& zinc) repletion — tyrosinase cofactor

PABA & calcium pantothenate (B5) — the "anti-gray vitamins"

Durable follicular redox delivery (catalase mimetic / H₂O₂ clearance to the bulb)

Gene & engineered-cell therapy for pigment-program reactivation

Melanocyte stem cell (McSC) niche restoration / de-stranding

Direct reprogramming / MITF reactivation of niche cells toward melanocytes

Senolytic clearance of the McSC niche to restore regenerative capacity

The graying-trial landscape & honest status (registered/active studies)

TGF-β pathway modulation to release the McSC quiescence brake