Everydayhealth.com suggests a healthy idea is to get more variety into the salad bowl

Brigid K. McVaugh, MS, RD, LD, a clinical dietitian at St. Luke's Episcopal Hospital in Houston, said all greens have something to offer, "where they differ is in the vitamin and mineral content."

Read on to find out the benefits of:

Kale is one of the healthiest salad greens around and the best cancer-fighting vegetable you can eat. One cup of this flavorful green from the cabbage family gives you all your daily vitamin A and C needs. It has more calories and carbs than many other salad greens, but the benefits are clearly worth it.

"It really is a powerhouse salad green," McVaugh said