It`s one of the most hydrating fruits in the world made up of 91% water,  low in calories but are full of nutrients , an excellent source of vitamins A ,C and E ,  Calcium ,  Magnesium and Zinc, and have significantly antioxidant . So grapefruit used as part of a healthy diet in addition lowering blood pressure. Vitamin C plays a vital role in the formation of collagen, the main support system of skin.