Hist-Arrest is a patented enzyme formula containing diamine oxidase (DAO) - the main enzyme responsible for the degradation of ingested histamine in the gut. 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.* Hist-Arrest w/ DAO is manufactured under license of Sciotec Diagnostic Technologies GmbH, Vienna, Austria. NOTE: Hist-Arrest does not manage or address antibody-related or IgE-related food allergies.*

• Still available. NATION-WIDE SHORTAGE. Backordered til February 9th. You can still order now for February delivery!
• All HormoneSynergy® supplements including Hist-Arrest w/ DAO are available and used by Dr. Retzler in her HormoneSynergy medical practice. ALL ORDERS PROCESSED AND SHIPPED STANDARD DELIVERY WITHIN ONE BUSINESS DAY FROM OUR PORTLAND OREGON CLINIC.
• Supports Healthy Degradation of Food-Derived Histamine and Enhances the Presence of Diamine Oxidase in the Digestive Tract*
• All products sold by HormoneSynergy are manufactured in facilities that are CERTIFIED for good manufacturing practices (cGMP) and that pass annual FDA and NSF inspections to ensure quality and safety.

Still available. NATION-WIDE SHORTAGE. Backordered til February 9th. You can still order now for February delivery!HormoneSynergy