One other thing!

....You might try in the mean time is Virgin Olive Oil. I've been taking this for a few months now - 1 tablespoon three times a day. This is both for your hair and also bowel movements. I still have dandruff (candida related when I eat wheat or sugar) but my hair is really shiny. (My skin is also really soft!)
To begin with, I took just plain olive oil as the taste of virgin oil was too strong for me. I've got used to it now and since changing to virgin oil my bowel movements have been alot more regular. It is especially effective taken last thing at night.
Otherwise I agree, you might have a mineral or other deficiency.. zinc?