Nutrition is crucial for overall well-being and health. A balanced diet helps the body function properly and build a defense against harmful diseases and conditions. Lack of nutrients hurts the body internally and affects the body externally. Dry, flaky skin is a direct result of poor nutrition. If skin is cracking and dull in appearance, don't just look at skin care, the season or the climate. Dry, flaky skin can be a sign of a bigger nutritional problem.

A lack of antioxidants such as vitamin A, C and E make skin vulnerable to free radical damage from the environment. Free radicals are unpaired molecules that damage the skin and cause premature aging and dryness. Antioxidants regulate oil production in the skin, prevent cell damage, lubricate cell membranes, produce collagen and encourage new cell growth for smooth, supple skin.

B vitamins are necessary for smooth and hydrated skin. Although a deficiency in B vitamins is rare, it's possible. If this water-soluble vitamin isn't replaced on a daily basis, the skin can suffer. Dry, cracked skin is a result of insufficient B vitamins. B vitamins all work together to create healthy skin, so a B complex vitamin is the best option.

Not all sun exposure is bad. Although you shouldn't bake in the sun, a deficiency in vitamin D leads to dry, flaky skin. Many foods--such as dairy products and cereals--are fortified with vitamin D. Look for these products the next time you go grocery shopping to ensure that you get an adequate amount of vitamin D.

Foods rich in antioxidants include colorful fruits and vegetables. Berries are especially potent; so are orange and red fruits and vegetables. Dairy products and lean meats such as turkey and chicken are good sources of B vitamins. Fish and eggs are good food sources of vitamin D.

Skin treatments for nutrient-deficient dry skin include natural ingredients that are found in most kitchens. Olive oil is an excellent moisturizer to help skin stay moisturized and permeable. Add a few drops of pure vitamin E oil to the olive oil for an intensive and effective nourishing night treatment. A weekly honey mask also benefits dry skin because it attracts moisture and helps the skin lock it in. Honey also contains potassium, which helps prevent bacteria built up from accumulated dry skin flakes.

Dry skin needs constant hydration. Drink at least 64 oz. water per day to ensure that you get enough fluids. Take a multivitamin when skin is dry so that the body isn't missing any form of nutrition. Always take a multivitamin with food for proper absorption.