Opinion | Nicotine pouches like Zyn must not be the next teen-addicting product - The Washington Post

But nicotine itself is far from harmless. Not only is it a highly addictive substance, but multiple studies have shown that it alters brain development. Use in adolescence reduces cognitive function; decreases attention span and memory; increases impulsivity; and enhances anxiety, fear and depression. Moreover, chronic use causes long-term changes in the brain's reward system, priming the brain for other addictions...

https://www.washingtonpost.com/opinions/2025/07/15/zyn-nicotine-pouches-teens-tobacco/