I was reading some figures, about snus specifically, that mentioned the levels of TSNAs that users of dip, snus, and cigarettes were exposed to. It said something like 3ppm for snus, 179 for dip, and 1000 or more for cigarettes.
Now, I know that combustion and additives make cigarettes considerably more dangerous, and expose users more deeply to larger amounts of chemicals. However, as far as actual tobacco-specific carcinogens, wouldnt the exposure be much the same for all products? Excepting snus perhaps which is of course produced significantly different.