Booker regularly exercises and has been a vegetarian since 1992, when he was a student at Oxford University in the UK.[208] He abstains from alcohol and "has no known vices or addictions" other than coffee.[209][210] In 2014, Booker began practicing a vegan diet[211][208] and has expressed his vegan ethical philosophy and advocacy for animals.[212] As of June 2016, Booker worshiped at the Metropolitan Baptist Church in Newark.[213]