Coming near the top is — butter lettuce? It's also called Boston or ... combined with how many nutrients (specifically potassium, fiber, protein, riboflavin, niacin, folate, B6, calcium, iron ...
Leafy greens are some of the most nutrient-dense vegetables you can ... from tender baby spinach to crunchy romaine, soft butter lettuce and spicy arugula. How do these greens differ nutritionally?