DAO Ultra™ provides high-potency DAO enzyme support to help your body break down dietary histamine from foods and drinks, so you can feel more confident before meals out, travel, wine, cheese, fermented foods, and leftovers.*
30,000 HDU of DAO per capsule for high-potency histamine digestion support*
Delayed-release DRcaps® designed for targeted release in the small intestine*
🇺🇸 MADE IN THE USA | 90-DAY EMPTY BOTTLE GUARANTEE
DAO Ultra™ was made for the moments when you want more confidence before higher-histamine meals.
Whether it’s dinner out, a glass of wine, a cheese board, fermented foods, cured meats, or leftovers, DAO Ultra™ provides targeted enzyme support before histamine-containing foods and drinks.*
DAO stands for diamine oxidase, an enzyme that helps break down histamine in the digestive tract.
Histamine is naturally found in many foods and drinks. Some foods contain more histamine than others, especially aged, fermented, cured, smoked, and leftover foods.
DAO Ultra™ provides supplemental DAO enzyme support before meals to help your body process dietary histamine from foods and drinks.*
DAO Ultra™ uses porcine kidney extract, an animal-based DAO source commonly associated with DAO supplementation research.
This is different from many plant-based “DAO” products, which may use different enzyme sources or plant-based amine oxidases. For people looking for a serious DAO formula, DAO Ultra™ offers a focused, high-potency approach to dietary histamine breakdown support.*
DAO is an enzyme, and enzymes need smart delivery.
DAO Ultra™ uses DRcaps® delayed-release capsules designed to help protect DAO through the stomach and release it later in the digestive process.*

High Potency.
DAO Support.
DAO Ultra™ is a high-potency DAO enzyme supplement designed for people who want targeted support before meals that may contain dietary histamine, like wine, aged cheese, fermented foods, cured meats, and leftovers.
High-potency DAO enzyme support in one simple capsule.
Designed to help protect DAO and release it later in the digestive process.
Uses porcine kidney extract, a DAO source commonly associated with DAO supplementation research.
Tested for identity, potency, and purity.
Made in a cGMP facility with globally sourced ingredients.
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DAO Ultra™ delivers 30,000 HDU of DAO enzyme per capsule for high-potency histamine digestion support.*
Take 1 capsule before meals as needed, especially before foods or drinks that may contain histamine. DAO Ultra™ is designed to support the breakdown of dietary histamine from meals and drinks.*
Yes. Our diamine oxidase enzyme material is sourced from Europe and encapsulated in our Wisconsin facility. Every batch is independently tested for enzyme activity, identity, potency, and purity.
Most clinical research on DAO supplementation has been done with porcine kidney-derived DAO, which is structurally most similar to the enzyme produced in the human body. Plant-based products typically contain plant amine oxidases, which are related but not identical compounds. DAO Ultra™ uses European-sourced porcine DAO for this reason, making it the best DAO supplement for everyday histamine support.