Hi,
SLS and other sulphate based ingredients haven't been proven to be harmful, some tests "prove" they are, others "prove" they aren't, all peer reviewed etc, so which is right?
Unfortunately it's a myth often put out and advertised by some companies, the more you see "SLS free" the more you think it must be bad right? When I tell you some toothpaste, conditioners, cleaners, moisturisers, and professionally used treatments have SLS in as well, how bad do you think it is for you?
Like all myths there may be some truth to it, but remember it's probably better to use something with SLS and useful active ingredients loike head and shoulders than touse something "organic" "all-natural" "SLS free" and made in someone's shed of hedge clippings and jaffa cakes, which obviously will not do what it claims.
Best of all of course is to be careful, avoid SLS etc. where you can, there are SLS free products out there that also have useful ingredients in, so instead of panicking think, do the research, and don't believe the pseudoscience many companies give out, look for tests etc, and try products carefully.
Also I did notice Elvis123 said hair loss has nothing to do with hormones as girls lose hair too, I'm afraid mate girls have hormones too, the same ones as men, including the often mentioned DHT. Hormones do have an effect, as does free radical damage, stress, certain chemicals, and diet. Trust me, I'm not a doctor I'm a chemist, we're quite good at this sort of thing!