The best-before date (BBD) indicates how long the manufacturer guarantees that a product will retain its specific properties, provided that the packaging remains undamaged and unopened and that it is removed cleanly and hygienically. As soon as a product is opened, it is exposed to various environmental influences that can affect its quality. If in doubt, rely on your own senses and regularly check the appearance and taste of the product. If you are unsure, it is better to stop using the product.