Deficiencies in nutrients such as vitamins A, E, D, iron, B vitamins and L-lysine may cause thinning eyebrows as well as thinning and weak hair. Fat-soluble vitamins A, E, and D all help to stimulate and support healthy hair growth and are found in spinach, carrots, bell peppers, kale, sunflower seeds, almonds, fish and eggs. Iron deficiency is diagnosed by measuring blood levels of ferritin and may be accompanied by frequent infections, brittle or spoon-shaped nails and decreased exercise ability. Sources of iron include meats, legumes, beans and whole grains. B vitamins are essential for metabolic functions in the body, and help the body cope with stress that can lead to hair loss. B vitamins are found in whole grains, leafy green vegetables, and legumes. L-lysine is an essential amino acid that appears to slow hair loss. Food sources include legumes, meat, fish, eggs, cheese and nuts. Therapeutic supplementation with the above vitamins requires consultation with a naturopathic doctor due to the potential for toxicity.
Overexposure to harmful rays from the sun can cause the most damage to sensitive skin tissues. UV rays can speed the loss of collagen and elastin fibers as well as encourage the growth of age spots and other skin conditions. To slow down skin damage that can lead to skin thinning, you should limit your exposure to UV radiation. When spending time outdoors, especially during the afternoon hours when the sun's rays are most direct and intense, you should apply a sunscreen with an SPF of 15 or higher [source: American Academy of Dermatology ]. You should reapply sunscreen every two hours or right after getting out of the water or drying off with a towel to ensure continued protection. If you wear makeup, you may also want to look into purchasing cosmetics that contain sunscreen; however, keep in mind that such cosmetics do not provide adequate sun protection when used alone.