MYTH:

Eating kale every day could potentially increase the risk of kidney stones for some people, as kale is high in oxalates, a compound that can contribute to stone formation, especially if consumed in large quantities without considering your individual risk factors and gut microbiome.

Busted!

Fear not! Those claims are baseless, according to University of Chicago kidney specialist Dr. Fredric Coe, a professor of medicine who built and has run the university’s kidney stone prevention center for 45 years.

“Kale offers all the benefits of dark green vegetable but it ranks really low in oxalate,” said Coe. There's only 17 milligrams of oxalate in a hundred grams (about 3 ounces) of kale.” “So in every three ounces of kale you get nothing” in terms of oxalate, added Coe. “Essentially, it's about impossible to eat enough of kale to cause kidney stones.” Source