A Ranking of the 10 Healthiest Salad Greens, From Best 

Kale is trendy because 1 cup of cooked kale delivers 19% of your daily vitamin A, which supports good vision, immunity, reproduction, heart, lung, and kidney function.

Kale Contains Vitamins, Phytonutrients, and Calcium

The mild flavor of spinach belies its nutritional value. Kennedy states "The most nutritious salad greens are generally the darkest in color."

Spinach Has Vitamins, Iron, and Folate

"While most people throw the beet greens away or buy them with the greens removed, they're actually very nutritious". 

Beet Greens Give You All Your Daily Vitamin K

The healthiest green you may not be eating is Swiss chard. Chard, a beet relative, tastes like spinach and is becoming more popular.

Swiss Chard Has Plenty of Vitamins A, C, and K

According to the USDA, one cup of mustard greens provides about half your daily vitamin C, all your vitamin K, and some folate.

Mustard Greens Provide Vitamin C and Folate

Collard greens provide enough vitamin K. According to the USDA, they contain 14% of your DV of vitamin C and a little amount of vitamin E.

Collard Greens Are a Good Source of Vitamin C

This salad green is popular in Europe but used as a garnish in the US. But don't underestimate watercress's nutritional potency. 

Watercress Has Vitamin C and Vitamin K

8 Easy Methods That Can Help You Get Gas Relief