Microdosing nicotine: Could it actually be good for your brain? Here's what experts say about the surprising trend.

As the psychoactive ingredient in tobacco products — not to mention increasingly popular e-cigarettes for vaping — nicotine has long been associated with risk and danger. But now the addictive stimulant is getting a rebrand, thanks to its presence in mints, gums and smokeless pouches from companies like Lucy (which calls itself "nicotine for normal people"), Nic Nac and Zyn, which offer products that deliver nicotine without the other chemicals associated with smoking and vaping.