If you are not fully satisfied with your purchase, simply return all used and unused bottles of the product within 180-days from the date when your order is placed for a complete refund of the purchase price. You will be refunded for every penny you paid to us including the shipping fee you paid us. We do not charge for any restock fee either. You must return all used and unused bottles of products originally sent to you at your own expense to us with a note requesting a refund. Guarantee valid for one purchase per household and products directly purchased from 15mlab.com. Failure to follow these policies may result in partial refund or no refund.