One of the crazier ingredients dumped into pretty much every kind of soap is Lauryl Sulfate. It's an ingredient that puts bubbles in your clean, and it's a detergent agent that makes it a good solvent to remove oils. Apparently, removing oil is considered a good thing and Americans don't seem to feel really clean unless there are a ton of bubbles foaming away the dirt and skin cells.
If one does a search for lauryl sulfate one very soon comes across any number of websites -- including the National Institute of Health Toxnet site -- that list Lauryl Sulfate as a potentially significant skin irritant. Yet, most soap companies use it in their soaps, shampoos, and even conditioners.
If you are plagued by dry skin; or have acne, dermatitis, eczema or rashes of any kind -- perhaps the problem is the Lauryl sulfate being lathered on your skin? Find a soap that does not contain lauryl sulfate and see if your skin problems don't clear up!