Question: best shampoo you can buy on amazon?
Answer: Nexxus Moisturizing Shampoo and Conditioner For Normal to Dry Hair Therappe Humectress Silicone-Free 33.8 oz, 2 count. ... 
Herbal Essences Argan Oil of Morocco Shampoo and Conditioner Bundle Pack, 2 Count. ... 
Pantene Moisturizing Shampoo and Conditioner for Dry Hair, Daily Moisture Renewal, Bundle Pack.