Jay Z turns 44 today and looks healthier than ever. He wants to stay that way by committing to a new lifestyle choice. The rapper and wife Beyonce are going vegan.

The Roc Nation leader made the announcement yesterday (Dec. 3) on his Life+Times blog with a short note explaining that he and Beyonce will undergo a 22-day vegan challenge.

"Why now? There’s something spiritual to me about it being my 44th birthday and the serendipity behind the number of days in this challenge; 22 (2+2=4) coupled with the fact that the challenge ends on Christmas day…It just feels right!" Jay Z writes.

Hov ends the note saying he will post his progress while asking vegan professionals for advice on where to eat. He also mused about what may happen after the challenge is over. "I don’t know what happens after Christmas. A semi-vegan, a full plant-based diet? Or just a spiritual and physical challenge? We’ll see…," he says.

Mr. Carter recently started the North American leg of the Magna Carta World Tour. The trek is set to continue through January 2014.