Easy Explanation on Instagram: "A watermelon and basil smoothie can help flush out developing kidney stones mainly by supporting hydration and urine flow. Watermelon is over 90 percent water and acts as a natural diuretic, helping the kidneys produce more urine. Increased urine flow helps dilute minerals like calcium and oxalates before they can concentrate and form stones. Watermelon also contains potassium, which helps balance minerals in the urine and supports healthy kidney function. Basil s