No, Yuka does not take into account the quantity of each ingredient in the products for several reasons:
1) The quantity is almost never listed by manufacturers.
2) Some ingredients, especially those suspected of being endocrine disruptors, can cause problems even in very small quantities (i.e. there is no threshold effect).
3) Some ingredients, even when present in small quantities in any given product, are used in a wide range of products. The cumulative exposure of certain population groups may then approach or even exceed the safety thresholds.
Our risk assessment of each cosmetic ingredient takes into account the population's exposure, as well as the generally expected quantities of that ingredient in the different categories of cosmetic products.
