US food agency called on to investigate Prime energy drink backed by YouTube stars

Backed by two of YouTube’s best known stars, Prime was an immediate sensation when it launched last year, prompting long lines in supermarkets and reports of school playground resale markets.

Logan Paul launched the beverage brand with another well-known YouTube star KSI last year (Alamy/PA)

An energy drink backed by two YouTube stars that has earned viral popularity among children is facing scrutiny from lawmakers and health experts over its potentially dangerous levels of caffeine.

A US senator has called on the country’s Food and Drug Administration to investigate Prime, a beverage brand founded by Logan Paul and KSI, that has become something of an obsession among the influencers’ legions of young followers.