For a start, food colorings that have been linked to cancer and tumors of the brain, thyroid, adrenal gland and kidney in animal studies. With any processed food you run the risk of coming across additives, and reading through ingredient labels can be like trying to decode a puzzle. Of course, eating largely fresh, whole foods is the best way to stay away from unsavory additives, but, if you absolutely must include processed foods in your diet, the following additives are ones you surely want to stay away from. Look for them on ingredient labels and if one turns up, take a pass. 12 point list here.