Fermented food is the hottest new trend in the halls of the White House. Members of President Donald Trump’s Cabinet are reportedly walking about with jars of sauerkraut in the hopes that it will give them glowing skin and tiny waists.
Wall Street Journal’s Liz Essley Whyte told Today, Explained co-host Sean Rameswaram that “Health Secretary Robert F. Kennedy Jr. Commerce Secretary Howard Lutnik, Transportation Secretary Sean Duffy, and Vice President JD Vance are all on this eat-a-lot-of-steak-and-sauerkraut diet.”
So, should we all be eating jars of sauerkraut? Or are ferments just the new Florsheims?
Below is an excerpt of their conversation, edited for length and clarity. There’s much more in the full podcast, so listen to Today, Explained wherever you get your podcasts, including Apple Podcasts, Pandora, and Spotify.
Is there a name for this diet?
Kennedy calls it the carnivore diet. I think people mean different things when they say that, but for him, it includes a lot of yogurt, a lot of kimchi or sauerkraut, a lot of steak, a lot of eggs. Kennedy now travels with sauerkraut. His wife has said that he has asked her to carry it in her purse for him, and she has said, “I actually cannot,” which is an amazing phrase. It seems they all think their skin is glowing, and people online have commented that JD Vance is looking good.
Are we sure it’s not Wegovy?
We don’t have any public knowledge of that, but we do know that he is eating eggs, sauerkraut, pickles, blackberries, and raspberries for lunch pretty often — and beef and lamb with sauerkraut for dinner. Then, when he’s on Air Force Two, he snacks on beef jerky and maybe eats a hamburger with cheese, no bun, and a side of fermented vegetables.
Now that you’re mentioning the full spectrum of JD Vance’s diet, it’s kind of reminding me of their new food pyramid. Is this part of that?
Earlier this year, Kennedy and the other health officials like to say they flipped the food pyramid. They recommended a lot more fruits and vegetables, red meat — which was controversial — and whole grains, and whole milk, that kind of thing. They also, and for the first time in the nation’s dietary guidelines, recommended fermented foods, which was something that was actually agreed upon by a lot of people, and they thought that was a good part of this, even if they had qualms about the red meat recommendations, because those can introduce more cardiac risk and risk of bad cholesterol.
How widespread is this in the White House? Does it go up all the way to the top, to the president?
Given what we have seen of his recent public dieting, I don’t think so. At the Knicks game, he was eating pizza and french fries, and, you know, he still has his Diet Coke button on his desk where he just pushes it and a Diet Coke comes. Kennedy said, once said on a podcast about him, “I don’t know how he’s alive.”
Does the science back this up, or is this some kind of quackery that ferments can make your skin healthier and help you lose weight?
I don’t think there are a lot of good studies that show exactly that sauerkraut can help you lose weight, but there have been a number of studies that have shown health benefits. Researchers have generally agreed that sauerkraut and other fermented foods can help with digestion and inflammation. There was a 2025 study from UC Davis that suggested fermented cabbage could protect your gut and protect against illness. Basically, they found that the intestinal cells do better with sauerkraut. They help maintain the integrity of those intestinal cells. And, in general, that has a lot of other good health effects. Mainstream scientists, dieticians, are pro-fermented veggies. This is not something that is hotly debated.
Most people in the scientific community are realizing there’s a lot of good fresh science out there about how important your gut really is in your overall health. The part of the diet that is a little more controversial is the focus on red meat. Obviously, that comes with some cardiac risk and some cholesterol risk. That is why when the new dietary guidelines came out and recommended more of that for Americans, that part, in particular, made some dietitians a little upset.
Do you think fermented foods could help people with this parasite that gives you explosive diarrhea?
I personally have not seen any studies on whether fermented foods help with explosive diarrhea, but let me know if you find one.
