Dee Cee Laboratories' dc® brand is manufactured in-house and contain no harmful chemicals or preservatives. We have a commitment to the quality of our product and to the quality of service we provide you. That is why we can offer the following guarantee without reservation or hesitation. We provide an ABSOLUTE 100% SATISFACTION GUARANTEE. It states that you must be completely satisfied with any product you purchase from Dee Cee Laboratories or you can return it within 30 days for a replacement, credit or full refund.