If you are suffering from dry, itchy scalp the Shea moisture: African black soap shampoo and conditioner work very well. I have very itchy, dry scalp and ever since using the products I rarely scratch my scalp. Also, their anti-breakage masque helps strengthen fine and thin hair, but I also find it useful for people transitioning to natural hair.
Paul Mitchell Tea Tree Special Shampoo and Conditioner 16.9 Oz Duo
From another pin: Organix thick & full biotin & collagen.You can buy them at Walmart. The shampoo and conditioner has no sulfates and smells amazing! The root boost spray (or the lotion one too) really thickens your hair.