While it's got Vitamins A and K, it's lacking a real nutrient punch. Next is the perennial, burger-topping iceberg lettuce. You'll need 33 cups of the stuff to get your daily Vitamin C.

What's with iceberg lettuce's reputation for not having nutritional value, then? "Other greens like romaine or arugula provide more protein, fiber, potassium, calcium and vitamin K, but that may ...

Take iceberg lettuce, for example. The popular crispy green is perhaps the least nutrient-dense because it’s 96% water, but it would still give you some amounts of vitamins A, C and K.

Don’t be too disheartened though, the iceberg lettuce does still contain small amounts of minerals and vitamins like calcium, vitamin C, vitamin K and iron. But when compared to protein-rich ...