Phytonadione
AKA “VITAMIN K1, Phylloquinone, Phytomenadione, Phytylmenadione, Mephyton, 3-Phytylmenadione, Monodion, Synthex P”
Synthetic
Ingredient Facts
Phytonadione
AKA: VITAMIN K1, Phylloquinone, Phytomenadione, Phytylmenadione, Mephyton, 3-Phytylmenadione, Monodion, Synthex P
Synthetic · Antioxidant · EWG: 4
Synthetic
Antioxidant
Skin Conditioner
Synthetic
Clean
Vitamin K1 helps strengthen and condition skin by improving circulation and reducing the appearance of dark circles and redness.
Solubility Insoluble in water
Formula
C31H46O2
Mol. Weight
450.70
CAS #
84-80-0, 81818-54-4
Form
Oil
State
Yellow viscous liquid; [Merck Index] Dark yellow or green viscous liquid; [Sigma-Aldrich MSDS]
See origin →
Functions
Antioxidant
Fights free radicals — the unstable molecules from UV, pollution, and stress that break down collagen and cause premature aging.
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Skin Conditioning Miscellaneous
Improves skin feel
Traditional Use
Vitamin K was discovered in 1929 by Danish biochemist Henrik Dam. Phylloquinone (K1) was identified in leafy greens and first used in skincare in the 1990s for its ability to reduce bruising, redness, and support skin barrier function.
Skin Types
●all-skin-types
Best For
Dark Circles
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR