Biohackers chasing the fountain of youth are turning to an unlikely new tool: nicotine. Once demonized for its role in cigarettes, the addictive stimulant is now being recast as a cognitive enhancer ...

This article was featured in the One Story to Read Today newsletter. Sign up for it here. For the better part of the past century, the case against nicotine was simple: Smoking a cigarette might feel ...

Nicotine itself could clear from your body in a few hours, but its byproduct can linger for days or weeks. Most nicotine tests detect cotinine, which can show up in urine, saliva, blood, hair, and ...

Nicotine pouches—small, flavored packets placed between the gums and lips—have recently become an increasingly appealing option for people trying to avoid cigarettes and traditional “smokeless” oral ...