Go with Romaine! The greener the better! It’s loaded with more Vitamin C, Vitamin A, Potassium and other vitamins than iceberg, green or red leaf lettuces.
Iceberg is the most popular lettuce in the United States, most likely because it ships well and it has a crispness that other types don’t. If you look at the USDA chart below you can see the comparison.
The most nutritious is Romaine, followed by Green Leaf, then Red Leaf, then Butterhead with Iceberg coming in last place.
At my house, we eat Romaine, but we don’t like its giant veins, so I throw those out. If you’re an Iceberg fan, try mixing in some other types. That way you still get the crunch, but you won’t miss out on the nutrients. After all, that’s why you’re having a salad right?!
This chart only rates 5 types of lettuce, but don’t forget arugula, radicchio or endive. You can try those out in the prepackaged lettuce section.
Personally, when I make a salad it always has spinach in it. Spinach beats any type of lettuce for nutrient density, but that’s a post for another day.