Quercetin: Can It Help Me?

Quercetin is a plant flavonoid found in many foods. It is a natural antioxidant compound that benefits the human body in a variety of ways. It is considered to be anti-inflammatory, anti-viral and anti-microbial.


Benefits of quercetin arise largely from quercetin’s ability to reduce inflammation. It reduces oxidative stress caused by pollutants and lack of good health habits. Eating onions before quercetin will enhance absorption and the beneficial effect on many diseases and conditions.

  • Allergies
  • Arthritis
  • Asthma
  • Atherosclerosis
  • Autoimmune disorders
  • Bladder inflammation
  • Blood vessel problems
  • Chronic fatigue
  • Chronic fatigue syndrome
  • Circulation problems
  • Cognitive impairment
  • Endurance
  • Eye-related disorders
  • Gout
  • Hay fever
  • Heart disease
  • High cholesterol
  • Infections
  • Insulin resistance and diabetes
  • Longevity
  • Ovarian inflammation
  • Pain
  • Prostate infections
  • Prostate inflammation
  • Reduces oxidative stress
  • Skin disorders
  • Stomach ulcers
  • Viral infections


  • *Capers
  • *Chile peppers, hot, green
  • *Onion, red, raw
  • American elder (herb)
  • Apples
  • Asparagus, raw
  • Beans
  • Bilberries
  • Black and green tea
  • Blackberries
  • Blood vessel health
  • Blueberries
  • British yellowhead
  • Buckwheat tea
  • Citrus fruits
  • Cocoa
  • Cranberries
  • Cruciferous vegetables
  • Dark cherries
  • Ginkgo biloba
  • Grapefruit
  • Indian gooseberry
  • Leafy green vegetables
  • Legumes
  • Milkweed
  • Neem
  • Nectarine
  • Olive oil
  • Pain
  • Peppers
  • Red wine
  • Sage
  • St. John’s wort
  • Tomatoes
  • Whole grains

* Foods with high levels


The need or advisability of supplementing with quercetin will depend on how much your particular diet provides on a daily basis. There is no RDA established for this nutrient thus far. To complicate matters, supplements have varying levels of the active ingredient. It might be wise to consult your doctor about a reasonable dose.

Remember that almost any substance can have an interaction with a drug. There are a few with which quercetin will interact so be sure to consult your doctor if you are using medications.