Hello do you know what kind of hair treatment or product is good for growing hair longer and thicker?
There is no magic bullet for growing thick hair.
We inherit hair genes from our ancestors and we have to do the best we can to take care of the hair we were born with.
We can weaken our hair by putting it through abuse. Example: swimming in chlorine based water, exposure to sun, over-coloring or bleaching, or using harsh thermal irons when we style our hair.
What will help weakened hair is to use good professional products which is appropriate for your hair type and use products which has a protein content to strengthen your hair.
I hope this helps.