Healthy skin, hair, and nails are the beauty trifecta, and these supplements are your best bet at hitting the jackpot.

If you want smoother skin, thicker hair, and stronger nails, you can boost your balanced diet with beauty-enhancing supplements, including proteins, essential fatty acids, vitamins, and minerals. Here are a few of the best.

Collagen, the face-plumping protein, starts to diminish after age 30, which causes the skin to decrease in thickness by about seven percent every 10 years. Collagen also strengthens hair and nails, and is essential for strong, healthy bones and joints. Although collagen provides the framework, elastin gives skin its stretch, and keratin is the protein that makes up 97 percent of your hair and strengthens nails.

Other crucial nutrients for skin health are EPA and DHA, the omega-3 essential fatty acids in fish oil, as well as GLA, the essential fatty acid in borage and evening primrose oils. Essential fatty acids reside in the membranes that surround skin cells, where they transport nutrients into the cell and waste out of the cell. They also regulate inflammation, retain moisture, promote cell turnover, distribute melanin, and prevent free radical and oxidative damage that causes skin aging.

Studies show that supplementing with EPA and DHA from fish oil inhibits the UV-related damage that causes premature aging and wrinkles. Research also shows that GLA from borage or evening primrose oils reduces skin water loss and improves skin function.

The mineral silicon is necessary for the formation of collagen and bone. Supplementing with orthosilicic acid, the dietary form of silicon, or the herb horsetail, which is rich in silica, can help smooth lines and wrinkles and also help strengthen brittle hair and nails.

Biotin is believed to help hair grow healthier, thicker, and longer. It may also fortify brittle nails, preventing them from splitting and breaking. Your nutritional supplements should also include vitamins A, C, and E, which help healthy skin, hair, and nails grow from the inside out.