The lactic acid in buttermilk makes for a great exfoliant for your skin & face.
Cleopatra used to bathe in buttermilk for softer skin. Add 2 tbs of buttermilk to your bath routine for similar results.
It may be beneficial for a number of skin conditions including dry skin.
If you live with dry skin, milk baths may help replenish lost moisture. The proteins and fat may help soften and soothe the skin. And lactic acid is a gentle exfoliator. Exfoliation is important for shedding dead skin cells, which can lead to softer skin.The proteins, fat, amino acids, and vitamin A and D found in milk can be calming and soothing for sunburned skin. Try soaking for up to 20 minutes. Follow your bath with a moisturizer for best results.