Lemonade and citrus fruits such as oranges, lemons and limes are weak sources of citrate (citric acid). You would have to consume a lot of lemon juice or eat a large amount of citrus fruits to get enough citrate to change urine chemistry. Moonstone contains effective amounts of alkali citrate. The citrate content of most fruits and vegetables contains both alkali citrate and citric acid, however, only alkali citrate will be excreted in the urine and raise urine citrate and pH levels. Moonstone was designed to optimize alkali citrate levels better than fruits, vegetables, or lemonade, in order to maximize kidney health.