"The darker the green, the more nutrition: kale or spinach, mixed greens, even romaine does have a ton of nutrition vs. iceberg lettuce," certified dietitian Leslie Langevin, MS, RD, CD, of Whole Health Nutrition told POPSUGAR. If you go for the prewashed, ready-to-go packages of mixed greens, you'll get a range of lettuce without a ton of effort. Faster and easier mean you'll actually make a salad!
Leslie also likes to recommend cabbage as a base for a salad, not only to offer fibre and a satisfying crunch, but also as a "mega-detoxifier and cancer preventor (because of its sulphur phytochemical compounds)." Bonus!