Oysters. Said to have aphrodisiac properties, oysters are among the best dietary sources of zinc, a mineral that is often recommended to people experiencing hair loss. Some studies indicate you need zinc for normal hair pigmentation as well. Zinc promotes cell reproduction and tissue growth and repair, all of which are important to hair health. A single oyster provides about 37 milligrams (mg) of zinc, more than a day’s worth for adults. Other good sources of zinc: Red meat, whole grains, other shellfish.

Beer. Hidden in all of that foam is a healthy dose of silicon, a natural element that some research suggests can help to thicken and strengthen hair. Studies have also found that silicon can improve hair that is dry and brittle. But when it comes to alcohol, more is definitely not better -- the Dietary Guidelines for Americans recommend that men limit themselves to no more than two drinks a day (or two 12-ounce beers), and women should stick to one. Other (non-alcoholic) sources of silicon: Bananas, root vegetables, whole grains.

Strawberries. Vitamin C is needed to maintain the natural oils on the scalp and hair to keep hair shiny, and strawberries are a good way to get it. Vitamin C is essential to normal circulation, and good blood flow to the scalp helps keep the skin and hair healthy. Adults need about 60 to 100 mg of Vitamin C per day -- one cup of whole fresh strawberries provides about 85 mg. Other great sources of Vitamin C: Broccoli, sweet red and green peppers, tomato juice, citrus fruits.

Avocados. A favorite ingredient in many commercial and homemade hair conditioners, avocados are rich in several nutrients including biotin, a B vitamin that promotes hair growth and scalp health. B vitamins are coenzymes essential to helping reactions occur in the body that can promote healthy cell growth, which is important for hair.. B vitamins and other coenzymes also stimulate blood flow throughout the body, including to the scalp. Other good sources of biotin: Egg yolks, nuts, whole grains, cauliflower, bananas.

Canola Oil. This common cooking oil is a great source of Vitamin E, a natural antioxidant that can help keep hair strong and flexible by protecting it from the damages of sunlight and other environmental threats that break down the protein bonds of hair and weaken it. Many vegetable oils are rich in Vitamin E, but canola oil is versatile and easy to use in recipes, and is less expensive and has a longer shelf life than other oils. One tablespoon of canola oil provides about 2.5 mg of Vitamin E, or about one-fifth of the 12 mg of Vitamin E recommend daily for adults. Other great sources of Vitamin E: Wheat germ, sunflower seeds, pine nuts, roasted almonds, safflower and sunflower oil.