Latest Hair Loss Treatment - Several different vitamin or mineral deficiencies can cause dry hair. To treat dry hair, try taking a multivitamin with 100 percent of the daily value of the essential vitamins. A multivitamin and mineral combination may provide some added coverage for possible deficiencies.

It's been shown that too little biotin and pantothenic acid (both B-complex vitamins) can lead to dry hair. Shampoos and hair treatment products commonly contain pantothenic acid (or pantothenol).