We are convinced of the quality of our product, that's why we give a 90 days money back guarantee. We do not require the return of unused product for a refund on the first 90 capsules. Beyond the use of the initial 90 capsules we do require the return of product. In this case we will cover the shipping costs for the return shipping. If you are not completely statisfied just give us a note through email, contact form or phone and we will give your money back.