At Allergy Research Group LLC (ARG), we stand behind our products and quality controls. If for any reason you are not satisfied with an Allergy Research Group®, NutriCology®, or Optimox® product you purchased from us 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 ARG 60-Day Satisfaction Guarantee is not available for products purchased from unauthorized sellers. The Guarantee is also limited to the original, end-user purchaser.

How To Claim The Guarantee

To submit a Guarantee request, please call one of our experts at 1 (800) 545-9960 and have information available regarding where and when you purchased your product. If your request is approved, you will then need to mail your product, a proof of purchase, and your Return Authorization Number to:

Allergy Research Group LLC
Attn: Customer Service
2300 South Main Street
South Salt Lake, UT 84115

You must submit your Guarantee request within 60 days of the date of purchase. Please note that you are responsible for costs incurred in mailing your product and proof of purchase.

Guarantee Guidelines

ARG 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 60-Day Satisfaction Guarantee.

If you have any questions regarding whether a seller is an authorized ARG seller, please contact us at