<unk>  is found in heat-treated commercial foods and is produced through thermal degradation of natural food constituents. It can be found in roasted coffee, instant coffee, and processed baby foods. Research has indicated that coffee made in espresso makers and coffee made from capsules contain more<unk>  than that made in traditional drip coffee makers, although the levels are still within safe health limits. Exposure to<unk>  at doses about 2,000 times the projected level of human exposure from foods increases the risk of hepatocellular tumors in rats and mice and bile duct tumors in rats.<unk>  is therefore listed as a possible human carcinogen.
Furan
Lime 
Naphthalene
Mycin
Gluten
Spirolactone
Nitrobenzene
Palate