Beyonce's trainer has revealed that the singer eats one vegan meal a day to  keep off her pregnancy weight.

The 31-year-old mother - who admitted to Oprah in an interview last week that she gained a whopping 57lbs while pregnant with daughter Blue Ivy  - apparently avoids eating animal products to maintain her fit, post-baby body.

Her trainer, Marco Borges, said that he recommended veganism to his client because it 'typically gets people to eat more greens than they normally would.

Although its guidelines are strict, those who follow a vegan lifestyle  benefit from lower cholesterol and blood pressure, a decreased risk of heart  disease and effective weight-loss results.

Since giving birth to daughter Blue Ivy, Beyonce has continued to snack on vegan foods like edamame, green apples and cucumbers sprinkled with vinegar, cayenne pepper and lemon.

According to Beyonce's trainer, the singer's diet plan - which saw her back on stage just three months after giving birth - also includes just a protein shake for lunch.

VIA: DAILY MAIL