Hello,
Shampoo does not nourish the hair. It is basically for cleaning the dirt and grime.
Your hair needs vitamins and minerals to grow that it can only get from the bloodstream. So if you want to speed up your hair growth and thickness you should limit the intake of fat and salts. Selenium, zinc and magnesium are some of the minerals that your hair needs and also amino acids and vitamin E will help in growing hairs.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
Shampooing is basically used as a cleanser for excess sebaceous secretions and dirt.They nourish the hair by penetrating. polymer cross linkings and correcting the structure.