Omega-3s found in fatty fish like salmon, sardines, and mackerel, regulate oil production and help keep your skin moist. They also delay the skin’s aging process to prevent wrinkles. One 2005 study found that EPA, a type of omega-3 found primarily in fish oil helps block the release of ultraviolet-induced enzymes that eat away at your skin’s collagen, causing lines and sagging skin. What’s more, omega-3s can boost your hair’s shine, prevent your strands from drying out, and keep your scalp from flaking. The recommended dose to reap the benefits is 600 mg of DHA per day.