I dont know. I do drink a lot of green tea so maybe that is what is keeping my hair in place.

Nothing ventured nothing gained.

When I used black tea as a tincture for athletes feet my feet did turn yellow brown but I was soaking my feet for an hour twice a day for almost a month. lol ( I got tired of having to wipe off my feet and store the tub of tea and switched to CO for the final cure).