Ans: Using buttermilk on your face every day is generally safe for most people. It can have skin benefits, such as moisturizing and exfoliating properties. In any case, in the event that you have sensitive skin, it's ideal to begin with a patch test. This will help to ensure it doesn't cause any adverse reactions. Additionally, it's a good practice to moisturize afterward, as buttermilk can be drying for some skin types.