Elon Musk admits to taking controversial weight loss drug previously opposed by RFK Jr.

"Ozempic Santa" Musk posted to X, formerly Twitter, on Christmas Day, alongside an image of himself in front of a well-decorated Christmas tree dressed as Santa Claus - but without his signature big belly. "Like Cocaine Bear, but Santa and Ozempic!"

In a follow-up post, Musk clarified that he is taking the brand-name version called Mounjaro, but said the clunky name didn't "have the same ring to it."

Musk's social media post over the holidays turned heads, considering Kennedy has expressed opposition to semaglutide. Originally developed as a diabetes medication, semaglutide has been used more widely in recent years for its appetite-suppressing effects.

"There's a huge push to sell this to the American people," Kennedy said of the semaglutide medication Ozempic when asked about his thoughts on the medication in October by Fox News' Greg Gutfeld. "They make this drug in Denmark, and in Denmark they do not recommend it for diabetes, or for obesity. They recommend dietary and behavioral changes." 

"I think the amount of good done by these medications by helping people lose weight and improve their cardiovascular system - and it might have long-term benefits in a lot of other areas as well, where obesity causes inflammation - is massive," Oz said last year in a video posted to his Instagram account.

Kennedy, who very well could become Oz's boss if they are both approved by the Senate, appeared to scale back his criticism of the new weight-loss drug amid his efforts to court support for his nomination from members of Congress.

"The first line of response should be lifestyle. It should be eating well, making sure that you don't get obese," Kennedy said during a quick interview with CNBC on the floor of the New York Stock Exchange, before adding that anti-obesity drugs like Ozempic "have a place" in the American medical community.  

Representatives for Musk, Kennedy and the Trump transition team did not provide a comment to Fox News Digital for this story.