1. What are the big 5 toxins to watch out for in nail polish, and why?

2. Why do other companies use these toxins, is there a benefit to the product?
I am not sure why a company would choose to use these ingredients, however at one time they were commonplace. The growth of the industry and development of a more natural focus has led to a greater awareness of ingredients and modern chemistry allows us to replace [these] with equally effective, more benign choices. [Photo via @zoyanailpolish]