First of all, before you do this, apply dairy milk to a part of your face and leave it there for some time. If you have no reaction then you’re good to go.
Dairy milk contains lactic acid and this is found in some skincare products as they help keep the skin moisturized and improves signs of ageing. It stimulates the collagen in your skin and firms theskin.
Milk can be used as an exfoliant since it has lactic acid in it. Make sure your hands are clean and apply the milk to your face.