Romelu Lukaku claims he was overweight at Manchester United due to a digestive problem.
Lukaku was criticised for a perceived weight problem, with former United captain Gary Neville describing the issue as "unforgivable" for a professional footballer.
"Normally I have a fine digestive system," Lukaku explained.
"I digest everything very quickly. That's how it had been my entire life. But what the nutritionist said to me was it had stopped working.
"I'm good now. My body is in the zone."