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:

Watercress, popular in Europe, is often used in the United States as a mere garnish. But don’t toss that watercress aside. It’s more nutrition-rich than romaine and leaf lettuce, providing about half your vitamin A and C needs and 10 percent of your calcium requirement. One cup of watercress provides all the vitamin K you need for the day. “Vitamin K creates proteins necessary for normal blood clotting, builds stronger bones, and protects against osteoporosis,” McVaugh said.