Hista Guard

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Hista Guard contains powerful antioxidant and anti-inflammatory ingredients that can help stabilize mast cells, reduce histamine, aid the liver, promote prostate health and help strengthen your immune system.


  • Helps manage inflammation by mediating the release of inflammatory compounds, such as leukotrienes and prostaglandins
  • Helps stabilize mast cells, which lowers the release of histamine
  • Helps reduce inflammation and trap free radicals

As a dietary supplement, take one (1) tabsule with or without food up to four (4) times a day or as directed by your health professional.

Does Not Contain
Gluten, Corn, Dairy, Soy or GMOs.

Do not consume this product if you are pregnant or nursing


Hista Guard contains powerful antioxidant and anti-inflammatory ingredients that can help stabilize mast cells, reduce histamine, aid the liver, promote prostate health and help strengthen your immune system. 

Quercetin, the main ingredient in Hista Guard, is an excellent anti-inflammatory and immune-system booster that can be used in a variety of protocols and is the main reason this product is so effective at lowering histamine levels in the body. It helps reduce allergic and inflammatory reactions because of its ability to help repair and stabilize delicate cell membranes. 

Hista Guard also contains pomegranate juice powder (Punica granatum), a powerful antioxidant that can reduce inflammation and trap free radicals. It promotes prostate health and has strong bacteriostatic effects. It also has anti-atherosclerotic properties.

Hista Guard also contains OPC flavanols (orthoproanthocyanidins), magnesium (as C16 and C18 alkyls), vegetable fiber, chlorophyll, and turmeric. In populations that consume higher levels of flavonoids and flavanols (such as the flavonoids and flavanols found in Hista Guard), there were lower rates of autoimmune, heart and vascular conditions.

Why We Love Hista Guard – The calm after the storm

At the clinic, we love using Hista Guard for histamine and mast cell issues, as well as for detoxification and inflammation support. It’s well tolerated by most patients and helps the liver and immune system, which makes it a staple in our protocols. 

While quercetin, the main ingredient, is wonderful at lowering histamine, keep in mind that the heightened release of histamine and the exaggerated mast cell activation is being triggered for a reason. The root cause should be discovered and addressed. While allergies can cause those issues as well, whenever we have patients with histamine and mast cell problems, we almost always find the root cause is mold, Bartonella or Babesia. 

Histamine isn’t just used by your immune system. It also affects the performance of the gut and the brain, which can create nerve symptoms, pain, anxiety, sleep issues, etc.

One of the main reasons we love Hista Guard is because of the success it’s had in reducing our patients’ symptoms. Compared to the many antihistamine and quercetin products we’ve tried at our clinic, Hista Guard is much more cost-efficient, convenient and manageable for patients. 

There are many quercetin products on the market, but we found you really needed a certain, high dose to really see the maximum benefits. This product is able to deliver that in a very unique form of quercetin that’s highly absorbable and offers a high dose in a low number of capsules, which is why this is by far our favorite antihistamine. 

Natural Mast Cell Stabilizers


† 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.


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Always be sure to speak with your healthcare provider before starting any new nutritional supplement when pregnant or nursing. For children, we recommend speaking with your child's pediatrician regarding proper dosing. Store away from children.

If loose stools occur, stop use and notify your healthcare practitioner.


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