u/alqaji

For thinning hair (due to vitamin deficiencies) and clogged follicles on scalp (sebum plugs I think?). Will this shampoo help my hair become stronger at the roots? I'm sure my hair loss is mainly caused by it being very thin and brittle due to vitamin deficiencies, as I mentioned, and it's just easy for it to fall out. Why do some people not find this shampoo helpful? Should I expect it to not work for me either, given the cause of my hair loss?