> However, they have not sucked on them like candy and swallowed the contents 16 hours a day.
Swedish Snus has been around a long time, isn't linked to cancer at all, and has no bad effect on your teeth and gums. Snus is actually associated with vast drops in cancer rates, because it usually replaces smoking. Snus is also no-spit - I think the difference between it and chewing tobaccos is that they are roasted and that snus is steamed. Makes a huge difference healthwise.
I don't have anything to say about the synthetic stuff, I'm not familiar. It's a bizarre industry that cropped up during a period where snus was trying to get into the market and the tobacco companies were trying to keep them out.
Somehow, cigarette companies lobbied to get snus caught up in cigarette taxes, even without the actual health risk. They were only even required to put the weakest possible warning on the package, because the health effects of snus have been well-studied and they're not associated with anything serious, except for nicotine addiction itself (which makes it a good substitute for smoking.)
The big US cigarette companies marketed a few horrible "snus" lines, with the marketing and goal that they would be a replacement product for when a smoker couldn't take a smoke break, and they were weak. I assume these synthetic lines developed to avoid taxes in some way by pretending to be a sort of medical product rather than a tobacco product, like a nicotine gum.
Snus is actually a better Nicorette, I suspected that the nicotene replacement industry had something to do with the sabotage of snus. Snus is cheap, free of health consequences, and doesn't lead you to associate something as addictive as chewing with nicotine consumption. Snus just quietly sits behind your lip, the minis are undetectable by the people you're interacting with, and they smell nice so they don't ruin your breath. Why would you choose a more expensive synthetic alternative?