We don’t use chemical additives to keep our products perfect for years. But it is a product you should use, so that’s ok. All our products can be used one year after opening, and to be honest, if it’s not used up by then, you never will. There are some things you can do to improve the shelf life. Keep the products in a cool dark place for instance. Soap should be stored dry after use. All pretty logical, but now you know for sure. Because we always make small batches, you can be sure the product is fresh and doesn’t is already shelfed for a year before you buy it.