Brhami, Brhingaraj, Neem, amla, there's tons more, but most strengthen hair follicles and the hair itself but don't deposit color and help with faster hair growth. They all have more specific things each powder does. I use ayurvedic oils instead now cause I can't be bothered with all that grit to rinse out but both oils and powders work. Just make a paste let it set in/on your hair it s like a hair mask for 15-20 min then rinse out. If you choose the oils make sure it has a good oil base like sesame or coconut, not mineral oil. I've been ordering my ayurvedic oil from amazon.com.
HHG
http://www.amazon.com/s/ref=bl_sr_h...=3760901&field-brandtextbin=Banyan Botanicals