Avoid any ph high chemicals!every time I use them, my scalp will itch after a while!anyhting acidic is best. Avoid preserves, that means make your own shampoo only! So far I used diluted vinegar with hot hot pepper, I think it,s good! Though I usually get lazy, and did not use pepper!just vinegar! If you wash daily, vinegar is good enough! Any thing, even if acidic, has preserves that kill vitamins on the skin, alkaline kills especially b1 on the skin! I have practiced for very long! I have very long hair, and wash twice with vinegar, so I use soap some times if hair gets oily! In summer, I do not use soap at all, if I wash my hair more than twice weekly.share my good experience, so you can try and share better ones.dandruff will cause hair loss! I am so scared of hair loss. If you use soap, try not rub in the scalp! Just the hair, and not too much!then rinse with vinegar, alkaline and vinegar reaction will clean the hair real nicely.