Molnova products are of high purity, stable, and the bioactivity has been verified. If you are not satisfied with our product or the product does not perform as described on the COA document, please contact our customer service department (info@molnova.com) for support. You could choose to return or exchange your purchased products under prior authorization from Molnova. Any items returned to Molnova should be placed in the original packaging and in the same condition as originally purchased. Please note that shipping, handling and packaging charges are not refundable.