Look for shampoos with a pH level close to that of your scalp, which is around 5.5. This can help maintain the natural balance of oils and prevent irritation. Hair is considered to be healthiest ...

Opt for a shampoo that promotes low pH balance, like Intelligent Nutrients PureLuxe Replenlishing Shampoo, £40, and a conditioner with humectants and emollients to keep moisture locked in.

Their skin has a higher pH level, so they need a special formula that won't irritate them. 1. A 2-in-1 shampoo and ...