Toxic chemicals found in many cosmetics can cause health issues. US researchers identified over 10,500 industrial chemicals used in cosmetics, including carcinogens, pesticides, and chemicals that disrupt hormones. Common cosmetic ingredients like fragrance, placenta, lead acetate, and hydroquinone can be harmful. Products like shampoo, lipstick, deodorant, perfume, and body lotion contain multiple chemicals that can cause irritation, allergies, cancer, and other issues with both short and long term use. Consumers can reduce risks by checking product ingredients and choosing cosmetics with fewer potentially toxic chemicals.