Saw palmetto (Serenoa repens) extract is a plant-derived ingredient used in topical skincare and haircare for its proposed ability to inhibit 5-alpha-reductase and reduce androgen-driven sebum production. It is studied primarily in the context of oily skin, acne, and androgenetic hair loss.
| Reported effect | How often | Notes |
|---|---|---|
Mild skin irritation or redness | Uncommon | Localized at the application site, usually transient. |
Contact dermatitis / allergic reaction | Rare | More likely in individuals sensitive to botanical extracts. |
Itching or stinging | Rare | Typically mild and self-limiting. |
Systemic hormonal effects from topical use | Very rare | Topical absorption is low; documented endocrine effects relate mainly to oral supplementation. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.