Question: what is the best shampoo to strengthen hair?
Answer:  Nioxin System 1 Cleanser Shampoo. ...   Art Naturals Organic Argan Oil Hair Loss Shampoo. ...   Laritelle Organic Shampoo. ...   Shea Moisture Sheamoisture Jamaican Black Castor Oil Strengthen & Restore Shampoo, 16.3 Oz. ...   Strong HairPro Hair Care Products (SHP Conditioner)