5. Methylisothiazolinone and Methylchloroisothiazolinone

When customers began to grow concerned about the safety of parabens, chemists created MI and MCI instead. However, a significant proportion of people are allergic to these chemicals (I'm one of them). And since they're now in many liquid products like shampoo and shower gel, it's a real nuisance having to avoid them.

Dimethicone
Explore more ...