Grey hair, thinning hair and hair health
I have been taking a goodly amount of iodine daily for some time now and have not noticed any difference in grey hairs.
I can't personally vouch for it, but Fo Ti has quite a history of being used for grey hair. Fo-ti is also called He shou wu, which translates to "black-haired Mr. He" or "Mr. He's black hair". I suspect there is something to it, at least for some people.
It has been reported that pine needle tea has helped with grey hair and over on the Hair Loss forum at least one source is claiming that Moringa and Moringa Root has restored both hair and hair color . I have long considered playing around with a topical hair tonic for hair loss and grey hair. Based on what I have found thus far, I am considering a combination of some or all of the following:
Safflower and/or coconut oil and/or almond oil together with extracts of:
moringa
dong quai
amia
rosemary
fenugreek
suma
mutamba
ho sho wu
pine needle
cayenne pepper
stinging nettle
Many of the same things that may be useful for thinning hair are also good suggestions for overall hair health and I would imagine that many of them would also be good to incorporate when looking for a remedy for grey hair too. I have put together quite a bit of information about diet, supplements and remedies you might find useful here:
http://www.tbyil.com/Baldness_and_Thinning_Hair.htm
Like anything else, any remedies or supplements for grey hair and other hair problems are much more likely to be succesful when used along with a healthy foundation built upon a good diet and healthy, active and stress free lifestyle.
Stress really does a number on the hair, as many vitamins and nutrients that normally nourish the hair are depleted by stress - especially the B vitamins. The same is true for caffeine.
All the best,
DQ