Ryno Power products have a shelf life of 3 years. The Mana Bar is the exception with a recommended 2-year shelf life to keep it fresher. They are all-natural and contain no preservatives, meaning that weather and humidity can cause changes in the product. They should be stored in a cool, dry place as much as possible. While some products have an expiration date noted on the packaging, others have an MFG date printed. Please add 3 years to the date in order to determine their expiration.