USDA certified organic food developed by world renowned avian veterinarian Greg Harrison. This food contains no pesticides GMO preservatives or artificial ingredients. Simply nutritious natural and wholesome. It is recomended that birds be first switched to the High potency formula for at least 6 months before offering other Harrison's products. We also recommend that you read all the instructions before using as this product contains no preservatives and must be kept in its original container for up to 6 weeks after opening.