Hypoallergenic shampoos are most suitable for sensitive scalps. Boots Expert Healthy Hair Sensitive Shampoo is a mild yet effective formula that keeps irritation away and removes dirt and grime. This shampoo with a hypoallergenic formula contains panthenol for giving your hair a detangled, moisturized and shiny appearance. It unique complex also contains hydrating and volumizing power of glycerin and pro-vitamin B5. It does not contain added fragrances to prevent scalp irritation. After two weeks of regular use, you might observe noticeable difference in dry and itchy scalp.