Grapefruit Seed Extract is made from organically grown grapefruit. This is the Original Grapefruit Seed Extract - unfiltered formula. Use one drop per cup in your bird's drinking water to help prevent bacteria buildup. This is especially useful for birds that like to dunk! ----This is also recommended for sprouting soaking water. Put 15 drops in the E-Z Sprout Container or  in the quart jar by Handy Pantry when soaking seeds.