Celebrity Vegans: From Beyoncé to Natalie Portman Beyoncé

While she chooses to refer to herself as plant-based as opposed to vegan, the 'Halo' singer underwent a 22-day vegan challenge with husband Jay-Z in 2013 and is believed to have maintained the diet ever since. Writing in the foreword of The Greenprint: Plant-Based Diet, Best Body, Better World by Marco Borges, the couple say: "We used to think of health as a diet – some worked for us, some didn’t. Once we looked at health as the truth, instead of a diet, it became a mission for us to share that truth and lifestyle with as many people as possible."

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