Quercetin

Quercetin is nature's antihistamine — and so much more. This plant flavonoid is one of the most abundant antioxidants in the human diet, found in foods like red onions, apples, berries, and green tea. But getting a therapeutic dose from food alone is tough, which is where supplementation comes in.

What makes quercetin special is its ability to stabilize mast cells — the immune cells that release histamine when they detect allergens. By keeping mast cells calm, quercetin can significantly reduce the sneezing, itching, and congestion that come with seasonal allergies, without the drowsiness of conventional antihistamines.

Beyond allergy relief, quercetin is a serious cardiovascular ally. Research shows it supports healthy blood pressure, reduces oxidative stress on blood vessels, and promotes a balanced inflammatory response. It also works synergistically with vitamin C, enhancing its absorption and extending its activity in the body. If you deal with seasonal allergies or just want a well-rounded antioxidant, quercetin delivers.