The Best Foods for Your Hair

You want: Help for your thinning hair

Try eating more: Vitamin D

Too little D could be contributing to your thinning. Researchers from Cairo University in Egypt compared serum ferritin (a way of measuring your body's iron stores) and vitamin D levels in women with hair loss with women who had healthy heads of hair and found that levels of the vitamin were as much as 121 percent lower among those with thinning. About 25 percent of people over the age of 1 included in a National Health and Nutrition Examination Survey between 2001 and 2006 were at risk of having inadequate levels of the vitamin. To get more D in your diet (the RDA is 600 IU, or 15 mcg), try fish sources like salmon, sardines or canned tuna, or fortified dairy sources like milk and yogurt (look for ones specifically labeled as fortified with vitamin D).