Scientists found that kale’s prized nutrients are hard for the body to absorb unless they’re eaten with oil. Cooking doesn’t improve absorption, but adding oil-based dressings—or even more advanced ...

Used by Pizza Hut as nothing more than a garnish in its salad bars in the 1990s, kale has exploded in popularity over the last two decades and has become a go-to nutritional powerhouse ingredient ...

Although it may seem like it, kale isn't a new vegetable. Thomas Jefferson experimented with several varieties of kale at his Monticello estate in the early 1800s. It's long been popular in northern ...