Nicotine itself has a short half-life—about two hours—which means it starts to clear from your system fairly quickly. That’s why its effects wear off fast, often prompting the urge to smoke ...

Some people with long COVID are turning to an unlikely remedy: nicotine gum and patches. Though typically used to quit smoking, nicotine is now being explored as a possible way to ease symptoms ...

The nicotine in the pouches gets absorbed into the body quickly, she said. “It’s six milligrams of nicotine. A cigarette, you’re only absorbing one to two milligrams of nicotine,” Walley said.

More Evidence Is Emerging. A new study that found high levels of heavy metals in popular nicotine vapes adds to concerns about the products. Share full article 439 OK McCausland for The New York Times ...