Zuckerberg was a vegetarian ... sort of. In 2011, he called himself a vegetarian but said he would eat meat if he killed the animal himself. He reportedly has gone back to eating meat he didn't personally kill.

No, Mark Zuckerberg is not a vegan. While there have been rumors over the years, he has clarified that his dietary choices are more focused on personal challenges and sustainability rather than a strict plant-based lifestyle. Most famously, in 2011, he set a challenge to only eat meat from animals he had personally killed to better appreciate the source of his food, which led many to mistakenly label him as "mostly vegetarian" or vegan during that period. In early 2024, he even shared on social media that he was starting a project to raise cattle (Wagyu and Angus) on Kauai, Hawaii, with a goal of creating some of the highest-quality beef in the world. While he may enjoy vegan meals and has expressed interest in sustainable farming, his recent ventures into luxury cattle ranching confirm that he remains an omnivore. In 2026, he continues to prioritize high-quality, ethically sourced foods as part of his overall health and fitness regimen.