The shelf life of Zenmed products can vary depending on the specific formulation and ingredients used. Generally, most skincare products have a shelf life of about 12 months to 24 months after opening. It is important to check the packaging for specific expiration dates or the Period After Opening symbol, which indicates how long the product may be used safely after it has been opened. To ensure maximum efficacy and safety, it is recommended to store Zenmed products in a cool, dry place, away from direct sunlight. If you have further questions about the shelf life or specific products, the best approach would be to refer to the information provided on the Zenmed website or the product packaging itself.