Vitamin K2
INCI: Menaquinone-4
Reviewed by Daisy · Last updated 18 Aug 2026
Also known as: Menaquinone, MK-4, Phylloquinone
Fat-soluble vitamin for reducing dark circles and bruising
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What Is Vitamin K2?
Vitamin K2 (menaquinone-4) is a fat-soluble vitamin that plays a crucial role in blood clotting and calcium metabolism. In skincare, it helps reduce the appearance of dark circles and bruising.
Dark circles are often caused by blood pooling or broken capillaries under the thin eye skin. Vitamin K2 supports the bodys natural clotting and clearing mechanisms to reduce this discolouration.
The ingredient is particularly effective when combined with other eye-targeting actives for comprehensive dark circle treatment.
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