Several years ago, the FDA banned the use of some food colorants in the USA. The Pennington Nectar formula contains Red Dye FD&C Red No. 40, which is approved for human consumption by the United States Food & Drug Administration. While there isn't any evidence that it is bad for hummingbirds, we recognize that some consumers do have concerns about dye and so offer a clear nectar as well - Pennington ElectroNectar.