Licefreee products do not require expiration dates and should be effective for several years. As a rule of thumb for all products without expiration dates, if you have had the product for at least three years, you should replace it with new product.
If you are unsure how old the product is, please look on the side of the bottle for a batch code. It will be 4-5 characters and be a combination of letters and numbers such as G1081. Send us an email via our contact form with the batch code and we can let you know how old the product is.