"Compared to kale, spinach is notable for containing more iron, which is vital for blood cells, energy and growth," she said, adding that a 100-gram serving of cooked spinach has approximately 3.6 ...

Haters of kale, rejoice! A new survey of kale samples taken from several US grocery stores found that seven out of eight samples had “disturbing” levels of per- and polyfluoroalkyl substances.

We think kale is the healthiest, the stuff of smoothie-swilling yogis. Collards are the domain of poor Southerners, drowned in pork lard. Watercress is for cute tea sandwiches.