The Benefits of Quercetin

by Melissa Chichester

During the “Age of Sail” between the mid-sixteenth and mid-nineteenth centuries, it was estimated that nearly 50% of sailors would die of scurvy. 

Today, scurvy is rare because of the discovery that it is caused by a Vitamin C deficiency.

Biochemist Albert Szent-Gyorgyi played a role in this discovery – he won a Nobel Prize for his research on bioflavonoids and Vitamin C. One of those bioflavonoids is a beneficial nutrient called quercetin. 

What is quercetin?

Quercetin is a natural yellow plant pigment that is a non-citrus bioflavonoid. In simpler terms, quercetin helps plants with their growth and development and is also involved in germination and photosynthesis. Modern-day research has revealed that plant pigments are not only beneficial to plants, but also beneficial for human health. 

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Quercetin in foods 

Quercetin is abundant in many foods. Onions are rich in quercetin, and it is highly concentrated in the outermost rings of red onions. It is also present in:

  • Honey
  • Cherries
  • Citrus fruits
  • Leafy green vegetables
  • Shallots
  • Raspberries
  • St. John’s Wort
  • Green tea. 

Quercetin does not have a Recommended Daily Value. However, if you’re eating a diet rich in fruits and vegetables, it’s likely that you’re consuming enough quercetin through your diet. The way you prepare food can impact the amount of quercetin you are receiving. Frying and boiling food reduces the amount of quercetin.

What’s the most concentrated source of quercetin? According to a study published in the Communications Biology journal, capers are the most concentrated natural source of quercetin. Asparagus is also a good source of quercetin. Cooked asparagus even has slightly more than raw asparagus.

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Quercetin supplements 

As a supplement, quercetin is added for overall wellness and is often combined with other nutrients for additional support.** 

Quercetin Complex with Vitamin C is a special formula that also features Ester C®, a buffered, non-acidic, and well-absorbed form of Vitamin C. 

Vitamin C is a potent antioxidant that helps neutralize harmful free radicals in cells.** Furthermore, Vitamin C plays an important role in the functioning of white blood cells, which are vital components of the immune system, and can also support upper respiratory health, promote iron absorption, and support healthy blood vessels.**

Quercetin Dihydrate 650 mg with Vitamin D 20 mcg (800 IU) combines the benefits of the sunshine vitamin with quercetin. Vitamin D is a fat-soluble vitamin that is synthesized in the skin upon exposure to sunlight. It can also be consumed through the diet, but it is very difficult.  Vitamin D is known for its many benefits, including assisting in maintaining a healthy immune system.** It also supports bone health.** One capsule daily of Quercetin + Vitamin D will provide nutrients to support your health and wellness.**

If you want to learn more about whether or not quercetin is right for your routine, it is important to discuss taking supplements with your personal healthcare practitioner.