Does Mira account for the quantity of each ingredient?

No, Mira does not factor in the quantity of each ingredient in a product. Here's why.

• Manufacturers almost never disclose exact amounts — a label shows the order of ingredients, not their concentrations.

• Some substances, in particular potential endocrine disruptors, can affect the body even in tiny amounts: there is simply no "safe threshold" for them.

• The same ingredient, present in small doses in one product, often shows up across many others. Day to day, the combined exposure can approach or exceed safe levels — even when its share in any single product is minor.

Instead, Mira rates cosmetics by composition: every ingredient is assessed for its risk to health and the environment. The highest-risk ingredient sets the rating band — a single high-risk component pushes the product into the "Bad" band, while a medium-risk one keeps it no higher than the lower-middle bands. Additional risky ingredients lower the rating further, and in short ingredient lists each one carries more weight.

When we determine an ingredient's risk level, we rely not on its dose in a specific product but on two more stable factors:

• how widely the population is exposed to the substance overall;

• the concentrations at which it typically appears across different categories of cosmetics.

This approach lets us flag potential risks honestly, without leaning on numbers that aren't printed on the packaging anyway.

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