Watercress (Nasturtium Officinale) also known as scurvy grass is of the Brassicaceae family – the family which cabbages, kale, broccoli and cauliflower belong to, therefore it is a cruciferous vegetable. Watercress has iodine levels second only to sea vegetables which is incredible for a land based vegetable. It also has a sulphur content second only to horseradish. It is full of other amazing minerals including germanium and many vitamins including the antioxidant vitamins and the anti-cancer vitamin B17. It loves to grow around water being a riparian herb but will grow in loose alkaline soil so long as it is kept moist. It tolerates either sun or shade. With its amazing mineral and vitamin content watercress has a beneficial effect on the thyroid gland and therefore metabolism and immunity, brain function, bile quality and collagen formation along with many other processes. It really is a superior herb for nutritive quality.