Watermelon When eaten on an empty stomach, it hydrates the body, supports skin health, and helps flush out toxins. Its high water content, vitamin C, and lycopene work together to 15 Effective Foods to Boost Glutathione Levels Naturally It has always been the easiest fruit to overlook. Watermelon, long associated with summer and hydration, is now being revisited through a scientific lens and the findings are quietly compelling. Studies The wonders of watermelon Mayo Clinic Health System