Vitamin K1 5% Cream (K-Max) – Rich Professional-Strength Formula for the Look of Under-Eye Shadows and Uneven Color – 2 Fl Oz (Pack of 1)

Vitamin K comes in two forms. This one is K1, carried as an oil in an AHA cream base.

It's the richer of the two, and it's the one for the eye area. For the look of under-eye shadows and uneven color.

An oil base is what you want on the thinnest skin on the face.

Key ingredients
Vitamin K1 (phylloquinone) 5%, as K1 oil, in an AHA cream base.

How to use
Tap a small amount around the eye with a ring finger, morning or night, staying off the lash line. Elsewhere on the face, a thin layer after serums.

Pro-K is the other one: Vitamin K2, powder-carried, lighter, for the face and larger areas.