Sen. Chuck Schumer called this week for a crackdown on ZYN, a nicotine pouch that has become increasingly popular in the United States, alongside the rise of so-called Zynfluencers who tout the product online. Nationwide sales of nicotine pouches, which users tuck into their upper lips, rose dramatically, with 808 million pouches sold in the first three months of 2022 alone, according to an analysis of four major brands. ZYN, which has quickly established a large footprint in the United States,