No we do not replace expired capsules.
We guarantee capsule shelf life of 2-5 months from delivery. Each capsule has an expiration date printed on both the box, the foil package and the capsule itself. The expiration dates are used to ensure the live antibody based chemistry is fresh and your test is accurate. If a capsule is beyond its expiration date, throw the capsule in the trash.
Please do not use capsules after they expire. Expired capsules will not detect gluten with the same accuracy as a fresh capsule and will have a higher chance of giving you an error.