Does eating burnt food cause cancer? My friend thinks that eating over-cooked food causes caner. He thinks that the burnt, black portions of the bread (e.G., burnt toast) or a burnt potato skin can cause (stomach) cancer in the long run. Should I cut of

Possibly. There is concern that eating burnt foods can increase your risk for developing certain types of cancer.
There . There are studies that show that your friend is right. Charred meat has chemicals that are known to cause cancer. This is usually meat that has been cooked at a high heat over a barbecue. The best things to do are to cook meat over a lower heat if you are grilling, do not put meat right on the flames, and do not eat charred portions of beef.