GI Hist Support

G.I. Hist Support is a formula designed to assist patients who have trouble processing external sources of histamine-rich foods and nutritional elements. This formula is especially helpful for those with genetic weaknesses in A01C (Diamine Oxidase), the main enzyme responsible for the degradation of ingested histamine.*

A key active ingredient in G.I. Hist Support is porcine-derived diamine oxidase (DAO), and research suggests that DAO derived from porcine kidney appears to have identical action to DAO derived from porcine intestine. Along with 5 other ingredients shown to support allergy relief, GI Hist is one of the best supplements on the market that includes key cofactors along with high dose DAO.*

Each ingredient is clinically tested to assist with histamine degradation and the oxidative stress created by histamines.*
Adults take 1-2 capsules no more than 15 minutes before the consumption of histamine-rich foods. Children take one capsule no more than 15 minutes before the consumption of histamine-rich foods or take as directed by your healthcare practitioner.

As a daily maintenance support product, take 2 capsules in AM and 2 capsules in PM.


Serving Size: 2 Vegetable Capsules 

Amount Per Serving
Vitamin C ... 200mg
(Ascorbic Acid)
Quercetin ... 100mg
Porcine Kidney ... 300mg
Alpha Lipoic Acid ... 100mg
Stinging Nettle Root 4:1 Extract ... 50mg
(Urtica dioica) (Equivalent to 200mg of Root)
Bromelain ... 100mg
(7 GDU)

Other Ingredients: Hypromellose (capsule), Ascorbyl Palmitate, Silicon Dioxide, Microcrystalline Cellulose
Caution: Consult your healthcare practitioner before use, especially if you are pregnant or nursing. Keep out of reach of children. Avoid if allergic to pork or any other ingredient. This formula is NOT EFFECTIVE for symptoms of immune-related food allergies, such as peanuts, shellfish, etc, or for gluten intolerance due to sensitivity or celiac disease.

Keep lid tightly closed and in cool, dry area.