Dr. Bob's should not be used as hair shampoo. Although the wet foam produced by Dr. Bob's on bath water does not sting eyes, concentrated lather produced by attempting to use Dr. Bob's as shampoo may sting eyes. Also, Dr. Bob's does not contain preservatives such as those used to keep micro-organisms that may infect eyes from growing in shampoos. Bath water is full of germs anyway, so any tiny amount that may come from a bottle of Dr. Bob's is not a concern in a bath. However, the manufacturer will keep Dr. Bob's as clean as practicable.
Although Dr. Bob's does not cause urinary or genital irritation, and is generally very mild, it can de-fat skin just like any soap. It is not a substitute for bath oil for people with very dry skin.