$60 Day Money Back Guarantee BioLean comes with a 100% money back guarantee for a full 60 days from the original purchase. If, within the first 60 days of purchase, you are not completely satisfied with BioLean, its results, or your experience, simply let us know by contacting our award-winning U.S.-based customer service team and we'll refund you the amount you paid within 48 hours of returning the product. That's right, just return the product, even the empty bottles, anytime within 60 days of purchase and you'll receive a refund, no questions asked!