In this Wednesday, Jan. 15, 2020, photo, scientist and study director Jennifer Molignano pipettes a sample of commercially available skin care product onto the surface of living human skin tissues while demonstrating an experiment created to evaluate the effects of exposing the product to skin tissues, at a MatTek Corporation lab, in Ashland, Mass. MatTek is a tissue engineering company that performs non-animal testing on cosmetics, skin care products and pharmaceuticals. (AP Photo/Steven Senne)
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