The actress has allegedly ditched her strict regime due to her long-distance relationship with singer husband Chris Martin.
According to the Daily Mail, sources have said that while filming her new movie Love Don't Let Me Down in Nashville, Paltrow has found comfort in co-star Tim McGraw while coping with the separation from her family.
A source said: "Gwyneth and Tim have become very close. He's married and older than her, but he's a good sounding board. In recent weeks her macrobiotic diet has gone out of the window."
Paltrow's spokesperson said: "She has been back in Nashville for only two-and-a-half weeks - she was in London for a week before that."