Andrew Huberman· PhD
Some people consume nicotine through dip, that is placing tobacco on the inside of the lip or in the cheek. Some people consume nicotine via snuff, which is literally the shoving of tobacco leaves up the nostrils and allowing the tobacco to access the nervous system and other areas of the body by permeating into the mucosal membranes, that is the lining, the soft lining of the nasal passages. And of course there are nicotine patches, nicotine gum, there's nicotine in pill form, there are toothpicks dipped in nicotine, et cetera.