If you want to vape, vape, I won't get involved, it's your personal choice.
Nicotine, no cancer, no smoke and no lung damage.
(It won't be sold in the EU, because of tobacco company lobbying.)
Snus is linked to mouth, throat, esophagus, stomach and pancreas cancer. Also, cancer of the penis.
You need to look at your comments in an incognito window or when you're logged out of your account. Many of them are showing [dead]. You might want to email HN to let them know.
And they are still blowing completely unknown, unregulated chemicals into the air you breathe.
Also, the ingredients are not unknown. Juices have vegetable glyceryn, propylene glycol, nicotine and food flavoring. That s all.
If you use soap, brush your teeth, eat food or some 100s other activities, you already are in contact multiple times a day with most of those things (except for nicotine, of course).