CogniCare Pro comes with a 100% money-back guarantee - a full 90 days from the original purchase. If you don't like the results within the first 90 days, just let us know by calling our toll-free number or sending an email and we'll give you a full refund within 48 hours of returning the product. That's right - simply return the product, even the empty vials, at any time within 90 days of purchase and you'll receive a full refund, no questions asked (minus shipping and handling fees).