The products also contain no menthol, alcohol or sodium lauryl sulfate.
The compound mentioned in the e-mail below is sodium lauryl sulfate.
Some contain a surfactant called sodium lauryl sulfate, which is a common cause of reactions, particularly in people with eczema.
The sulfates (such as sodium lauryl sulfate and sodium laureth sulfate) are detergents that are commonly used in soaps and shampoos because they are inexpensive and make a lot of foam.
Sodium lauryl sulfate (SLS), a component of some toothpastes, is a potential cause of canker sores.