Jay-Z makes his bodyguards drink a special protein shake

The 39-year-old rapper is keen for h is six security men to be in tip top condition, and so makes them gulp a drink made from his own recipe.

A source said: "Every day Jay-Z lines up his guards, hands them a protein drink of his own concoction – fresh vegetable juices, fruits, protein powder, wheat germ, vitamin supplements – then eyeballs the tough guys until every last drop is gone."

Jay-Z doesn't even let up from the routine when he is on tour.

He ensures all hotel kitchens are given the recipe, and then requests seven glasses of the drink are brought to him and his companions by room service.

This is not the fist time Jay-Z's love of drinks has been documented.

The '99 Problems' rapper recently admitted he used to motivate his staff at Def Jam records - where he was label president - with champagne cocktails.

He said: "I had Bellini Fridays! Basically at 4pm on Fridays we'd all have Bellinis. Alcohol can smooth everyone out. I'm not promoting drinking to young people though!"