Do you agree with what Jay says about this diet?

The couple will avoid meat and animal products until Christmas Day.

Jay Z and Beyoncé are embracing the healthy life this month by going vegan for 22 days. The rapper, who turns 44 today (December 4), revealed his new "plant-based" diet on his Life + Times blog on Tuesday saying, "It just feels right!"

"Psychologists have said it takes 21 days to make or break a habit. On the 22nd day, you've found the way," Jay Z wrote. "On December 3, one day before my 44th birthday, I will embark on a 22 Days challenge to go completely vegan, or as I prefer to call it, plant-based! This all began a few months back when a good friend and vegan challenged me to embrace a 'plant-based breakfast' every day. It was surprisingly easier on me than I thought."

Jay also explained that this will be "a spiritual and physical cleanse" and looks forward to the challenge, adding that he'll post about his progress as the month goes along. As for why he's decided to take the vegan leap now, he said, "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," he wrote. "It just feels right!"