Which specific lettuce variety is sometimes cited as carrying more protein and calcium compared to other types?

Answer

Green leaf lettuce.

While lettuce generally is a low-density source of protein, there are noted variations in micronutrient concentration depending on the cultivar chosen. The text specifies that Green leaf lettuce is occasionally referenced as having a slight nutritional advantage over other types of lettuce regarding certain components. Specifically, Green leaf lettuce is cited as sometimes carrying higher amounts of protein and calcium, alongside possessing a broader spectrum of vitamins when compared side-by-side with other common lettuce varieties.

Which specific lettuce variety is sometimes cited as carrying more protein and calcium compared to other types?
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