Host Defense 90-Day Satisfaction Guarantee

At Fungi Perfecti, LLC (“Fungi Perfecti”), we take great pride in our Host Defense® products and stand behind them.  If for any reason you are not satisfied with a Host Defense® product you purchased in the United States from,, or one of our authorized sellers, you may request a refund or replacement product.  Please note that because we are unable to control the quality of our products sold by unauthorized sellers, unless otherwise prohibited by law, the Host Defense 90-Day Satisfaction Guarantee is not available for products purchased from unauthorized sellers, including unauthorized sellers selling products through third-party marketplace websites such as or  The Guarantee is also limited to the original, end-user purchaser.

How To Claim The Guarantee

To submit a Guarantee request, we encourage you to contact the supplier or reseller from whom you purchased the product for guidance regarding a return.  If they are unable to resolve the issue, please contact our customer service team at:

Phone: 1-800-780-9126

Please be ready to provide your name, order number (if purchased from Fungi Perfecti), shipping address, name and lot code of the product to be returned, and proof of purchase including where and when you purchased your product.  Fungi Perfecti may also require the submission of photos of your product and/or its packaging.

If your request is approved, Fungi Perfecti may then require that you mail the unused portion of your Host Defense product and proof of purchase (if not already submitted) to:

8940 Select CT SE
Tumwater, WA 98501

If asked to return the unused portion of your Host Defense product, Fungi Perfecti will provide a prepaid shipping label for your use.  You must submit your Guarantee request within 90 days of the date of purchase.

Guarantee Guidelines

Fungi Perfecti reserves the right to verify information, require a valid proof of purchase, and to deny Guarantee requests in its discretion in cases of suspected fraud or if customer has abused the Host Defense 90-Day Satisfaction Guarantee.

If you have any questions regarding whether a seller is an authorized seller of Host Defense products, please contact us at 1-800-780-9126 or