Skin aging is driven by two mechanisms: intrinsic (chronological) senescence accumulation and extrinsic (UV-induced) senescence induction. Senescent dermal fibroblasts secrete MMP-1, MMP-3, and MMP-9, which degrade collagen I and III and reduce skin elasticity. Fisetin addresses both mechanisms: senolytic clearance of accumulated senescent fibroblasts and prevention of new UV-induced senescence.

Will fisetin improve skin appearance visibly?

Individual results vary. The mechanism supports improved skin quality via reduced collagen degradation and senescent fibroblast clearance. Users in longevity circles report improvements in skin texture and elasticity, but controlled cosmetic trials are lacking.

Some cosmetic brands include fisetin in anti-aging formulations. Topical bioavailability into dermis is limited (~1–5% penetration). Oral supplementation delivers fisetin systemically to all skin layers.

How long does it take to see skin effects?