Do Cooked Onions Have Quercetin? (EXPLAINED)

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Do cooked onions have Quercetin?

Whether you love onion rings, onions cooked in sauces, or raw onions in your salads, it is hard to deny that they are genuinely a savory treat. It doesn’t hurt that onions are also packed with nutrients and help us maintain a healthy heart. Considering all these pluses, it is little wonder Americans consume 21.9 pounds of onions per person annually. Raw onions are high in quercetin, but what if you cook them. Do cooked onions have quercetin? 

Quick Answer: Yes – Cooked onions do contain quercetin. Compared to other similar foods, their quercetin content is high.

Quercetin Content of X

Yellow onions, when cooked, can contain 41.9mg per 100g serving. They are also rich in calcium, potassium, magnesium, and phosphorus.

Is Cooked Onion High in Quercetin?

Yes, cooked onion is high in quercetin.

Compared to other foods, cooked onions are very high in quercetin.

Let’s take a look at how cooked onions compare to 5 similar foods.

  • Raw banana peppers are slightly higher in quercetin than cooked onions, averaging 50.63mg per 100g.
  • Fennel contains 48.8mg per 100g, making its quercetin content a touch higher than the 41.9mg per 100g found in cooked onions.
  • Raw onions have a lower quercetin concentration than cooked onions and only provide 39.21mg per 100g.
  • Scallions are much lower in quercetin than cooked onions providing only 10.68mg per 100g.
  • Mexican Oregano has nearly identical quercetin content supplying 42 mg per 100g.