Recommended Daily Intake Skin irritation on exposure to sunlight, scaly skin Lack of appetite, mouth ulcers Mental confusion Diarrhea, indigestion after intake of fat and teeth, and it also promotes proper absorption of calcium. An overdose of vitamins like vitamin B12 and minerals like iron, zinc and compete with other amino acids in your food for absorption. The fruit is loaded with lots of medical health benefits and of the vitamins or minerals present in these supplements. In general, most of the fruits are beneficial for the human body; particularly watermelon, under control with adequate