On TikTok, videos about filtering vodka with a Brita are going viral.
Experts say removing impurities can change taste and reduce hangover symptoms.
Alcohol-based social media trends can harm kids, a researcher said.
TikTokers gain hundreds of thousands of views by filtering vodka with a Brita water filter.
Elliott Norris, aka @callmebelly, posted a video on September 17 in which he and Louis Levanti tasted vodka before and after filtering.
On the second taste, Norris says, "It tastes like nothing," says Levanti. Like water."