What is quercetin?

What is quercetin?

Quercetin is a potent antioxidant-rich flavonoid (plant pigment) found most abundantly in onion, capers and kale.

It is sought after for its wide-ranging benefits including immune support, sports performance, antioxidant, heart health, chondroprotective and allergy relief.

But free quercetin’s taste, solubility and bioavailability issues have long been obstacles. Read on to learn more about the sources and benefits of this widely-available flavonoid. 


What is quercetin used for?

Quercetin has been involved in a wide range of studies, with research suggesting potential benefits including:


Sources of quercetin

Quercetin can be obtained through many plant-based foods, and is widely available in supplement form.

  • Onion
  • Capers
  • Kale
  • Peppers
  • Asparagus
  • Red Leaf Lettuce


How to get the greatest possible quercetin benefits

Tomorrow’s Nutrition SunActive IsoQ is an innovative and more efficient way to deliver quercetin’s benefits to your body. It is a clinically studied, soluble form of isoquercitrin (a precursor to quercetin) that is 25 times more bioavailable than quercetin. A 364 mg dose of SunActive IsoQ is equivalent to 1,000 mg of quercetin! Plus, this formula also contains generous amounts of immune-supporting vitamin C. 

Derived from rutin (extracted from the flower buds of the Japanese Pagoda tree), patented Tomorrow’s Nutrition SunActive IsoQ is chemically identical to isoquercitrin found in nature. It is made possible by a unique delivery system that greatly increases absorption. As demonstrated in a human clinical study, the body easily converts SunActive IsoQ into free quercetin. 

Quercetin was the subject of more than 2000 published papers in 2020 alone. It makes sense to choose a form that is most easily absorbed and used by the body. Tomorrow’s Nutrition SunActive IsoQ is Generally Recognized as Safe (GRAS) by a panel of independent experts. It is also 100% gluten free, non-dairy and is packaged in a BPA-free bottle. 

Tomorrow’s Nutrition SunActive IsoQ is also Informed Sport certified, which confirms that each and every production batch is free of contamination, impurities and banned substances.  



Have further questions about quercetin? Feel free to leave a comment below!

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