Nootopia stands behind our products and guarantees that they will do what we say they do. If you purchase 1 bottle of CollaGenius 2.0 and you are not completely satisfied, within 365 days you may request a full refund. If you choose to save money and buy a bundle of multiple bottles, you are still covered by a 365-day guarantee. If after your first bottle you are not satisfied, you can return your remaining unopened bottles within 365 days of purchase and we will issue you a full refund for your order.