BioLean is backed by a 100% money back guarantee for 60 full days from your original purchase. If you're not totally and completely satisfied with BioLean, your results or your experience in the first 60 days from your purchase simply let us know by contacting our award winning US based customer support team and we'll give you a refund within 48 hours of the product being returned.That's right, simply return the product, even empty bottles, anytime within 60 days of your purchase and you'll receive a refund, no questions asked!