Because the ingredients are natural, they all work together very nicely. Unlike chemicals, which combine to form new properties, using all natural ingredients combine to exhibit the properties of all the ingredients involved. You really can't do it wrong. Have fun mixing and matching to see all the great masks you can come up with! Use the fruit before it gets to the mold stage although you can cut away the mold and the fruit that is left is still full of nutrients. Use discretion to decide if the fruit is suitable and of course be aware of any allergies you may have and avoid those ingredients.