According to the American Cancer Society: > The most harmful cancer-causing substances in smokeless tobacco are tobacco-specific nitrosamines. > Cancers linke

According to the American Cancer Society: > The most harmful cancer-causing substances in smokeless tobacco are tobacco-specific nitrosamines. > Cancers linked to the use of smokeless tobacco include: * Mouth, tongue, cheek, and gum cancer * Cancer in the esophagus * Pancreatic cancer You can also get other kinds of mouth and tooth problems, and of course nicotine is still a definite health risk. If there were a way to make tobacco healthy, I think the manufacturers would have spared no expense to do so, because the death of a customer prevents them from spending more money on what is sold. (No idea about anti-vaping people, though.)