Your kit has an expiry date because of the gels found in the collection microtainers. These gels become less effective at stabilizing your blood sample as time passes. We recommend you use the kit within 2months of delivery. We will let you know on your dashboard if your kit expired and we will help you arrange redelivery. Please note that we will only send you an additional kit free of charge the first time it expires. After this, you will have to pay a small fee for an additional kit.