Watermelon isn't just a refreshing treat. When it's ripe, it's also got plenty of an antioxidant called glutathione. It strengthens the immune system, so it can fight infection. https: wb.md 4uMLihz L Citrulline, Free Form Amino Acid, 5.3 oz (150 g) Eight weeks of resistance training in conjunction with glutathione and L Citrulline supplementation increases lean mass and has no adverse effects on blood clinical safety markers in resistance trained males Journal of the Healthy Origins L Citrulline Powder