Why do they not have a longer expiry date?

Morning & Night does not contain any synthetic preservatives. We believe fresh is best and what may be seen as a short shelf life is a by-product of making sure our formula stays at its optimum, to deliver the best results. The expiration is a guide and we leave it to our customers' discretion regarding whether to consume the product beyond its expiry date. However, for tangible results, we would recommend that our customers consume Morning and Night within the expiry date.