Quercetin: Nature's Seasonal Support Flavonoid for Healthy Histamine Levels

If certain times of the year leave you reaching for the tissues, you're not alone. Many people look for natural ways to support their body's response to seasonal changes, and one plant compound keeps showing up in the research: Quercetin.

Quercetin is a flavonoid, a natural plant pigment found in many everyday fruits and vegetables. Laboratory studies suggest Quercetin may help stabilise mast cells, the immune cells that store and release histamine. That's why researchers are interested in its role in supporting healthy histamine levels and seasonal comfort.

What Is Histamine and Why Does It Matter?

Histamine is a normal messenger in the body. It helps with immune signalling, digestion and even sleep-wake cycles. During seasonal changes, mast cells can release more histamine than usual, which is linked to the familiar itchy eyes, sneezing and congestion many people experience.

Supporting balanced histamine release, rather than blocking it outright, is the idea behind food-based approaches like Quercetin.

Where Is Quercetin Found in Food?

Quercetin occurs naturally in:

• Onions (especially red onions) and capers
• Apples (with the skin on), cherries, berries and red grapes
• Broccoli and leafy greens
• Black and green tea
• Citrus fruit

Quercetin is believed to contribute to the health benefits of these foods. It's also an antioxidant, which means it helps neutralise free radicals.

What Do the Studies Say?

Here are two human studies worth knowing about:

• Seasonal eye comfort: In a randomized, placebo-controlled trial in Japan, adults with seasonal pollen sensitivity took a Quercetin-based flavonoid (enzymatically modified isoquercitrin) during pollen season. The study found fewer eye symptoms in the flavonoid group than in the placebo group (Kawai et al., 2009).
• Men's prostate comfort: In a small double-blind, placebo-controlled trial, men with chronic prostatitis/chronic pelvic pain took 500mg of Quercetin twice daily for one month. 67% of the Quercetin group reported at least a 25% improvement in their symptom score, compared with 20% of the placebo group (Shoskes et al., 1999).

These are promising but small studies. More research is needed, and Quercetin is not a replacement for medical care.

Is It Safe? How Is It Made?

BoostCeuticals Quercetin products are made in the USA in a GMP-certified facility (Good Manufacturing Practices). Our formulas are vegan, in plant-based capsules, with no stearates and no silica.

Quercetin is generally well tolerated. It is not intended for pregnant or nursing women. If you take any medications, are planning a medical procedure, or have a history of kidney stones, talk to your doctor before use.

Our Quercetin Formula

Our Zinc Quercetin combines Quercetin with zinc picolinate (50mg), 850mg of vitamin C and vitamin D3. These are nutrients that work together to support healthy immune function, for women and men.

Shop Zinc Quercetin

References

1. Kawai M, et al. Preventative effect of a flavonoid, enzymatically modified isoquercitrin on ocular symptoms of Japanese cedar pollinosis. Allergology International. 2009;58(3):373-382. PubMed
2. Shoskes DA, et al. Quercetin in men with category III chronic prostatitis: a preliminary prospective, double-blind, placebo-controlled trial. Urology. 1999;54(6):960-963. PubMed

*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.