While industry and government officials debate the safety of nanotech, 256 popular products have already been identified where nanomaterials are listed as ingredients. Products include eye liner, moisturizer, bronzer, lip balm and sunscreen.

Why should you care? Nanomaterials are super-tiny manmade chemicals that may pose unpredictable risks to public health. The FDA is concerned about these micro-sized ingredients because their toxicity may be very different, and potentially more severe than normal-sized chemical ingredients.