DAO-Hist is a patented enzyme formula containing diamine oxidase (DAO)—the main enzyme responsible for the degradation of ingested histamine. This enzyme has been clinically tested and found to break down food-derived histamine in the digestive tract. DAO is not absorbed and does not have systemic activity. DAO-Hist does not manage or address antibody-related or IgE-related food allergies.*
Made in the USA
Take one capsule daily, or as directed by your healthcare practitioner.
Servings Per Container:
Check out some common questions below
Can I pick up my products from your office?
You can pick up and pay for your order at our main office at 2 Overhill Road, Suite 260, Scarsdale, NY, 10583, United States.
What is your Refund and Cancellation Policy?
Cancellation Policy - Customers may cancel an order by contacting us. If a cancellation is requested after an order has shipped, the package must be returned for refund, as per our Return Policy.
Return Policy: Refunds are provided on all bottles returned within 30 days. To obtain a return authorization please contact us. Customer assumes all shipping costs.
How much does shipping cost?
Shipping is Free within the Continental United States when your order exceeds $100.00, otherwise it's $9.95. Shipping to Hawaii and Alaska is $19.95. Shipping elsewhere is $39.95.
Get more answers to all of your questions on our FAQs page