11. Sodium benzoate
This additive is used in fruit juices, carbonated drinks and pickles to impede the growth of microorganisms in acidic foods. However, when used in beverages also containing ascorbic acid or vitamin C, sodium benzoate forms small amounts of benzene, a cancer causing substance.
In addition, sodium benzoate can deprive cells of oxygen and break down the immune system. Not to be confused with benzoic acid, which is naturally found in low levels in many fruits, sodium benzoate is a synthesized additive.