Some waterproof mascara formulations have been found to contain per- and polyfluoroalkyl substances, also known as PFAs. These substances have water-resistant properties which is why they're also sometimes used in nonstick cookware and stain-resistant carpeting. However, PFAs have been associated with impaired immune function, certain cancers, and increased risk of diabetes, obesity and endocrine disruption.

This mercury-based element is sometimes used in mascara formulations as a preservative as it kills bacteria. There has been a lot of skepticism about whether it's safe to use a mercury-based ingredient in the eye area.

Always use a make-up remover that breaks down stubborn mascara. The Instant Eye Make-Up Remover completely removes make-up around the eyes, including waterproof mascara. It also contains rose and cornflower waters that soothe and nourish the skin around the eyes.