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Bath and shower products, as part of the $50-billion personal care products industry, have become big business in the United States.

Indeed, from the looks of ads, enticing aromatic soaps and gels have clearly become part of that invigorating daily shower or relaxing hot bath experience.

But have you ever glimpsed at the label of that fragrantly silky gel you're splashing over your hands and body or that bar of soap that promises to keep you smelling great all day long?