- Nitrites and Nitrates: Used in cured meats, these compounds can form nitrosamines, which have been linked to an increased risk of certain cancers, such as colorectal cancer. - Benzoates: Sodium benzoate, when combined with ascorbic acid (vitamin C), can form benzene, a known carcinogen. - Parabens: Commonly used in cosmetics, parabens have been found to mimic estrogen, potentially increasing the risk of breast cancer.