Precautions while using Shampoo
Not all ingredients are created equally
Many shampoos contain foaming agents like ammonium lauryl sulfate, ammonium laureth sulfate or sodium lauryl sulfate, which are harsh and drying to the scalp, Maggiore says. So you should stay away from those shampoos. Instead, sodium laureth sulfate is a gentler agent, as well as TEA lauryl or laureth sulfates, which are also good picks.