Phytonadione (vitamin K1) is a fat-soluble vitamin used topically in skincare to help reduce bruising, dark under-eye circles, and visible redness or broken capillaries. It is thought to support normal blood coagulation and vascular integrity when applied to the skin.
| Reported effect | How often | Notes |
|---|---|---|
| Mild skin irritation or redness | Uncommon | Transient local reaction at the application site. |
| Allergic contact dermatitis | Rare | Eczematous reaction reported in sensitized individuals. |
| Pseudoscleroderma / Texier's syndrome | Very rare | Localized skin hardening reported mainly with injectable forms, not typical topical cosmetic use. |
Frequencies reflect typical cosmetic use reported in the literature, not a guarantee for your skin.