Parabens: Parabens would be the most well-known dangerous ingredient. Parabens are a class of commonly used preservatives used to make your make up last longer. While the purpose for parabens is extremely useful. They have estrogen mimicking properties and have been found in some cancerous breast tissue, making some scientists question if there is a link between parabens and breast cancer. But no definite conclusions have been reached.

Fragrance: On the backs of cosmetic products they often state fragrance is an ingredient but don’t specify what ingredients are in the fragrance. The concern with this is that some fragrances have been found to be associated with concerns such as allergies, dermatitis, respiratory distress and potential effects on the reproductive system.

Phthalates: Phthalates are often found in fragrance (but not always listed), nail polish, deodorants, hairsprays, lotions and moisturizers.  They are endocrine disruptors and have been linked to increased risk of breast cancer, early breast development in girls, and reproductive birth defects in males and females.