How to read cosmetic ingredient lists

Ingredient lists are useful, but they are not a scorecard. A label can tell you what is present and, within limits, its relative order. It cannot tell you the exact formula, how ingredients work together or whether a product will suit your skin.

Start with the product’s purpose

Compare the label with the product’s stated function and directions. A cleanser, moisturizer and sunscreen are designed for different jobs, so a single ingredient should not be judged outside the formula around it.

Understand the order

Under U.S. cosmetic labeling rules, ingredients are generally listed in descending order of predominance. Ingredients present at one percent or less may be listed in any order after those above one percent. Other markets can have different requirements, so treat order as a useful clue, not a precise concentration chart.

Look for the full picture

• Check directions and warnings, not only the ingredient list.
• If you have sensitive skin, patch-test according to the product directions.
• Stop use if irritation occurs and seek qualified medical advice for persistent concerns.
• Avoid assuming that “natural” automatically means gentle or that a long chemical name is unsafe.

Sources

• U.S. FDA — Cosmetics Labeling Guide