8. Romaine Lettuce
Romaine lettuce is a common leafy vegetable with sturdy, dark leaves with a firm center rib.
It has a crunchy texture and is a popular lettuce, particularly in Caesar salads.
It’s a good source of vitamins A and K, with one cup (47 grams) providing 82% and 60% of the DVs for these vitamins respectively (24).
What’s more, research in rats showed that lettuce improved their levels of blood lipids, potentially reducing the risk of heart disease. Further studies need to investigate these benefits in people (25Trusted Source).