Do supplements expire? The short answer is that most products carry a shelf life indicated by best-by or expiration dates. Shelf life is the period during which the manufacturer expects the product to be within its labeled quality when stored as directed. Because ingredients and packaging differ, dates vary from product to product. Keeping supplements in appropriate storage and using them up to the date shown helps maintain the intended quality. How to read best-by dates and other labels: Look for labels such as "Best by," "Best if used by," or "EXP" on the bottle or packaging. The date on the label is the manufacturer’s estimate of the time frame for quality, not a guarantee beyond that point. Not all products use the same wording, so read the entire package for notes about opening, storage, or date interpretation, and check for any additional guidance from the manufacturer. Safe-use guidelines: Before using a product, inspect the container and its seal. Do not use if the seal is broken, if the container shows signs of damage, or if there are unusual signs like moisture or discoloration. If you have questions about whether a product is still suitable, contact the manufacturer using the information on the label. Keep supplements out of reach of children and follow any specific notes provided on the packaging. Storage tips to keep vitamins effective and safe: Store supplements in a cool, dry place away from direct sunlight. Keep the product in its original container with the lid tightly closed to limit exposure to air and moisture. Avoid bathroom storage or other humid environments, and protect products from heat when traveling. If you need to transfer contents to another container, note the original lot and date information to stay organized and avoid confusion.