Olive oil seals in moisture to smooth and plump the skin, thanks to its fatty acids and antioxidants. The result is hydrated, glowing skin. Olive oil contains antioxidants, including vitamin E. Antioxidants help calm redness and irritation caused by acne or psoriasis. They also protect against free radicals that can lead to wrinkles and premature aging of the skin. Olive oil contains alpha-hydroxy acids, which stimulate the shedding of dead skin cells and encourage new cell growth. The result is smoother-looking skin.