| 1 | Nitrites and nitrates have long been recognized as potent carcinogens. | |
| 2 | Such oil can contain carcinogens and toxic mould. | |
| 3 | Vegetables do not form heterocyclic amines or any other carcinogens during cooking. | |
| 4 | Carcinogens in the smoke damage DNA, which often results in mutations in genes that promote the development of cancer. | |
| 5 | WHO has classified 107 agents, mixtures, and exposure situations as carcinogenic to humans. |