NEW YORK (AP) An influencer-backed energy drink that has earned viral popularity among children is facing scrutiny from lawmakers and health experts over its potentially dangerous levels of caffeine.

On Sunday, Sen. Charles Schumer called on the Food and Drug Administration to investigate PRIME, a beverage brand founded by the YouTube stars Logan Paul and KSI that has become something of an obsession among the influencers legions of young followers.

One of the summers hottest status symbols for kids is not an outfit, or a toyits a beverage, said Schumer, a Democrat from New York. But buyer and parents beware because its a serious health concern for the kids it so feverishly targets.

Backed by two of YouTubes best known stars, PRIME was an immediate sensation when it launched last year, prompting long lines in grocery stores and reports of school yard resale markets.