I just read in this article that two chemicals in Johnson & Johnson's baby shampoo considered harmful to babies. There has been trace of potentially cancer-causing chemicals – dioxane and a substance called quaternium-15 that releases formaldehyde in them:
http://www.huffingtonpost.com/2011/11/01/johnson-johnson-baby-sham_n_1069123.html

“Children are exposed to so many harmful products yet we are continuous¬ly told that, in small doses, these exposures are harmless”. This is the great lie! Our livers and kidneys are taxed by the chemicals used in manufactur¬ing body care products. The planet is saturated (flushed birth control pills and unused drugs have contaminat¬ed water tables), women's bodies are holding parabens and other chemicals in our fatty tissues. Cancers, osteoporos¬is and other degenerati¬ve diseases plague us and then big pharma and the western health care system want to pump us with more chemicals.

Unless you're filthy, the body needs very little, but some, cleansing agent, plenty of water and occasional buffing. Most shampoos strip scalp and hair of oils and then product companies sell you more "toxic" stuff to make your hair smooth and shiny. Use products without "cones" (e.g. dimethacon¬e), parabens and dyes. Learn to use essential oils and body oils (avocado, sesame, etc.). Do it for you, your family and the Earth.

Why don’t we just drop anything with chemical? How would it effect our life I wonder?