The young stars are said to have been given instructions to start eating vitamin-filled fruit and vegetable smoothies to keep spots at bay.
It is thought the make-up the boyband wear when performing is not good for their skin and is causing them to have bad spot break-outs.
A source told the Daily Star: "The lads are already sick of their health drinks but they know they have to have them."
Despite these supposed orders from the band's management, One Direction are apparently reluctant to completely cut out junk food.
An insider revealed: "When they're rehearsing for hours on end the boys almost always have takeaway pizza and Harry is a sucker for Chinese takeaways."