BHT (Preservative):BHT is one of the best best preservatives out there, although it is also know to be carcinogenic and also tumorigenic. Which means it can cause cancer and tumors. It is also very hard on metabolism.

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Image url:http://upload.wikimedia.org/wikipedia/commons/5/5c/2%2C6-bis%281%2C1-dimethylethyl%29-4-methylphenol.svg