Watercress is extremely healthy, why? Because it’s a wealth of vitamins and minerals, positively brimming with beta-carotene and Vitamin A equivalent, needed for healthy skin and eyes. It’s a better source of vitamins B1, B6, E, K and the essential nutrient vitamin C, and to put it into perspective it actually contains more vitamin C gram for gram than oranges, more calcium than milk, more iron than spinach and more folate than bananas.