Running two hyper-prominent Silicon Valley companies is, no doubt, both mentally and physically draining. Recently, on the Ben Greenfield Fitness: Diet, Fat Loss and Performance podcast, Jack Dorsey, the billionaire CEO of both Twitter and Square, opened up about how he stays sharp and healthy, and it's about as weird as you'd expect.

Dorsey's taken some flak for his wellness tips before, like when he tweeted that people should visit Myanmar after he attended a meditation retreat there, glossing over the fact that the government there is currently involved in ethnic cleansing. But on the Ben Greenfield podcast, he just ran through his own habits, without advocating that anyone else copy him. Some of them are super reasonable and healthy-sounding, though: Journaling! Meditating twice a day! Vitamins!

Some of the stuff is just impractical for the average person, like walking five miles to and from work every day. Or alternating between a mini sauna and an ice bath every few minutes over a quarter hour. Or working under an infrared lightbulb because it makes you sweat and sweat cleanses your body of toxins (Note: That's actually what the liver and kidneys are for.)

But still, that's mostly benign. It's Dorsey's eating habits in particular that seem extreme. During the week, he eats a single meal each day, at dinner. Those meals consist of a protein, green vegetables, and dark chocolate or berries for dessert. So he's clocking 10 miles a day on minimal calories and carbs. And on the weekend he just...doesn't eat. Like from Friday night through Sunday, he only drinks water, which means that the once-a-day meals during the week is him being indulgent. He described what the weekend-long fasting experience is like, saying:

The first time I did it, like day three, I felt like I was hallucinating. It was a weird state to be in. But as I did it the next two times, it just became so apparent to me how much of our days are centered around meals and how—the experience I had was when I was fasting for much longer, how time really slowed down.

Just to be totally clear and not liable: You should eat food. Food, very generally speaking, is good. And you shouldn't try to disrupt your way out of the need to eat for any reason, but especially not as a time-saving tool.