Vinegar restores the natural acidity of the skin, claims HowStuffWorks. Because vinegar has a positive effect on the skin and is inexpensive, it is commonly used as a natural beauty product.
Vinegar may help alleviate skin problems such as itchiness, dryness and flaking, and may help clear up acne and lighten age spots. Vinegar can be used in the bath to relieve itchy skin, as a dandruff treatment for the scalp, a cleanser or toner for the face, or as an aftershave. Undiluted vinegar is highly acidic and is often combined with water and other natural ingredients before using it on the skin.