Hist Arrest with DAO | Histamine Balance & Digestive Support

RetzlerRx® Hist Arrest is a high-potency histamine support formula delivering 20,000 HDU of Diamine Oxidase (DAO) per tablet, the key enzyme involved in breaking down dietary histamine.*

Designed for individuals sensitive to histamine-rich foods or environmental triggers, this physician-formulated supplement helps support balanced histamine levels, digestive comfort, and immune health.* By supporting DAO activity, Hist Arrest promotes a more comfortable response to histamine and helps support digestive and immune resilience.*

Whether you are looking for targeted support around meals or a doctor-formulated approach to histamine balance, RetzlerRx® Hist Arrest provides focused enzyme-based support for digestive wellness and everyday comfort.*

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Key Features & Benefits

• 20,000 HDU DAO Enzyme – Delivers high-potency diamine oxidase support per tablet.*
• Supports Histamine Balance – Helps maintain normal histamine handling in the gut.*
• Digestive Comfort – Supports digestive wellness and comfort around histamine-containing foods.*
• Immune Health Support – Helps support balanced immune system responses.*
• Targeted Support – Ideal for individuals sensitive to histamine-rich foods or environmental triggers.*
• Clean Formula – Non-GMO, gluten-free, and made with premium-quality ingredients.
• Doctor Formulated – Developed using principles of functional and longevity medicine.

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Key Ingredients

Diamine Oxidase (DAO) is an enzyme involved in the breakdown of dietary histamine in the digestive tract.* Supporting DAO activity may help promote digestive comfort and balanced responses to histamine-containing foods.*

This formula delivers 20,000 HDU of DAO per tablet, providing targeted enzyme support for individuals seeking help with histamine balance and meal-related comfort.*

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Why RetzlerRx®

RetzlerRx® supplements are developed within the HormoneSynergy® Longevity Medicine ecosystem using principles of Evidence-Based Preventive Longevity Medicine. Each formula is selected for ingredient quality, clinical relevance, and real-world patient use within a physician-guided care model.

• Practitioner-formulated nutritional support
• Clinically relevant ingredient selection
• Designed to complement preventive longevity medicine strategies
• Focused on high-quality, clean-label formulations

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Suggested Use

Take one tablet before meals, or as directed by your healthcare provider.

RetzlerRx® Hist Arrest with 20,000 HDU DAO enzyme is your doctor-formulated solution for natural histamine balance, digestive wellness, and immune support.*

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Frequently Asked Questions

What does Hist Arrest support?

This formula is designed to support histamine balance, digestive comfort, and immune resilience, especially around meals containing histamine-rich foods.*

What is DAO?

DAO, or diamine oxidase, is an enzyme involved in breaking down dietary histamine in the digestive tract.*

Who may benefit from DAO support?

Individuals who are sensitive to histamine-rich foods or who want targeted digestive support before meals may benefit from DAO supplementation.*

How should I take Hist Arrest?

Take one tablet before meals, or as directed by your healthcare provider.

Where can I see the full ingredient and product details?

For a complete description of ingredients, directions, and research, please click here.

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*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

HormoneSynergy® Longevity Medicine
Portland • Lake Oswego • Oregon
Evidence-Based Preventive Longevity Medicine