Cosmetic Safety Guides

Plain-language articles about how cosmetic products are regulated, labeled, and tolerated by skin.

• When a Cosmetic Reaction Needs a Professional

  Most reactions to a skincare product settle on their own. Learn the signs that mean call a clinician today, the signs that mean emergency care, and what to do in the meantime.

• Sunscreen Safety: Mineral and Chemical Filters Compared

  How mineral and chemical UV filters work, what the FDA absorption studies did and did not show, and how to pick a sunscreen you will actually wear every day.

• What "Clean Beauty" and "Non-Toxic" Actually Mean

  Clean, natural, non-toxic, and chemical-free are marketing terms with no legal definition in US cosmetics law. Here is what they signal, what they do not, and what to look at instead.

• Common Irritants, Allergens, and How Patch Testing Works

  Irritation and allergy are different problems with different timelines. Learn which cosmetic ingredients cause each, how to test a product at home, and when to ask for formal patch testing.

• How to Read a Cosmetic Ingredient Label

  Ingredient lists follow rules. Learn the order, the 1 percent line, what INCI names are, and why "fragrance" can stand in for dozens of separate substances.

• How Cosmetics Are Regulated in the United States

  What the FDA can and cannot do about cosmetics, what the 2022 MoCRA law changed, and why "FDA approved" almost never applies to a moisturizer or a mascara.