Does Kale Have Quercetin? (EXPLAINED)

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Does Kale Have Quercetin?

Kale is a nutritional superstar. Once considered a minor crop, that all changed when people realized just how tasty kale is and its many health benefits. We now know that regularly consuming kale is a flavorful way to help protect our heart’s health and ourselves from certain types of cancer. Our question is, does kale have quercetin. 

Quick Answer: Yes – Kale does contain quercetin. Compared to other similar foods, its quercetin content is exceptionally high.

Quercetin Content of Kale

The quercetin concentration in kale is 22.58mg/100g, and it is a rich source of vitamins A and C, calcium, and glucosinolates.

Is Kale High in Quercetin?

Compared to other foods, kale is very high in quercetin.

Let’s take a look at how it compares to 5 similar foods.

  • Red cabbage contains 0.36mg/100g of quercetin which is hardly even a comparison to kale.
  • Offering only 0.54mg/100g of quercetin cauliflower is over 22mg behind kale.
  • Swiss chard slightly exceeds kale’s quercetin content providing 2.63mg/100g.
  • With just 0.39mg/100g of quercetin, celery is no competition for kale. 
  • Broccoli provides 3.26mg/100g of quercetin, roughly 1/3rd that of kale. 

Sources: 

Harvard School of Public Health “Kale“: https://www.hsph.harvard.edu/nutritionsource/food-features/kale/ 

Mayo Clinic “The many types and health benefits of kale”: https://www.mayoclinichealthsystem.org/hometown-health/speaking-of-health/the-many-types-and-health-benefits-of-kale 

USDA Database for the Flavonoid Content of Selected Foods: https://www.ars.usda.gov/arsuserfiles/80400525/data/flav/flav_r03.pdf 

Curious about the top sources of quercetin? We've created this chart of the top 25 quercetin containing sources per 100 grams: [table id=141 /]

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