nothing with sls in it as that kills the scalp but nisim has this so you should use a dht blocker and a herbal shampoo. I have used the boots one alpercin and it did work but it is not herbal and has sls in it. I went to a hair transplant guy who said to use herbal shampoo so apart from bicarb of soda and apple cider vinegar i am now using himalayan which is herbal. I also bought jobaba too and jergens but i found these really expensive for what it is and the scalp goes a bit mad. What do you guys use as a shampoo?