His coach and nutritionist George Lockhart revealed Parker eats up to 7,000 calories a day and has fish three or four times a week, and again for his cheat meal on Sundays.
Parker, 33, can eat up to 40 pieces of sushi in a sitting and it can take so long the restaurant has to close up.
Parker has changed his diet to eat more fish, lean pork and chicken, having moved away from red meat as a method to bulk up.
JOSEPH PARKER has a cheat meal which often forces restaurants to close and can leave waitresses stunned.
Parker is a big fan of fish and has eaten it raw previously - biting into a whole fish to get his protein hit.
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