How are cosmetic products rated?

How are cosmetic products rated?

Mira rates cosmetics by their composition: the app breaks a product down into its individual ingredients (by INCI) and analyses each one.

Drawing on current scientific data, every ingredient is assigned a level of risk to health and the environment. We look at several dimensions: allergenicity, irritation, endocrine disruption, cancer risk and pollution. Inside the app, each ingredient shows its potential risks along with the scientific sources behind the assessment.

A product's rating is a score paired with a colour band: 'Excellent', 'Good', 'Poor' or 'Bad'.

The core principle: the riskiest ingredient sets the rating.

• A single high-risk ingredient pushes the product into the lowest band, 'Bad', regardless of the rest of its composition.

• If the riskiest ingredient is only of medium risk, the product cannot rise above the lower-middle bands.

Any other risky ingredients lower the score further within that band. Short ingredient lists are judged more strictly: when there are few ingredients, a single problematic one makes up a larger share of the formula and weighs more heavily on the result.

The rating is Mira's opinion. The words 'Excellent', 'Good', 'Poor' and 'Bad' refer to the rating, not to the product itself.