Global Shampoo Market Size study, by Product (2-in-1 Shampoo, Anti-dandruff Shampoo, Kids Shampoo, Medicated Shampoo, Standard Shampoo, and Other Products), Distribution Channel (Supermarkets/Hypermarkets, Specialist Retailers, Convenience Stores, Drug Stores and Pharmacies, Online Stores, and Other Distribution Channels) and Regional Forecasts 2021-2027