Mark Zuckerberg's eating habits went viral after he revealed his McDonald's order and why he needed 4 000 calories daily.

The billionaire tech mogul recently shared some of his eating habits after responding to a Threads post by McDonald's, in which the fast food restaurant wrote, "Y'all want anything from McDonald's."

The Meta co-founder then explained that he is "not cutting weight" and needs 4 000 calories a day "to offset all the activity".

Zuckerberg, who won his first Brazilian jiu-jitsu competition in May, has given his followers an inside glimpse into his fitness journey in recent years.

And his newfound habits have not gone unnoticed.

In June, Zuckerberg made headlines for seemingly accepting a "cage match" with tech rival Elon Musk.

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