is quercetin an effective antioxidant

Every skincare brand has its antioxidant darling.

Caudalie has resveratrol (from grapes). Nivea has co-enzyme Q10. Korres has quercetin.

Literally no one had heard of quercetin before Korres proudly showed off its name on all its skincare products. Now, it’s on everyone’s lips.

Rumour has it, it can reduce wrinkles and make your skin firmer and more elastic. Can it deliver? Here’s what science says:

What Is Quercetin?

Quercetin is a member of the flavonoid family, a group of antioxidants with soothing properties.

Flavonoids are the pigments that give fruits and vegs their beautiful rich colours. You’ll find quercetin in apples, tea, olive oil, leafy vegs like cabbage and spinach, citrus fruits, red wine and grapes – to name just a few!

How Does Quercetin Benefit Your Skin?

Quercetin is a flavonoid, so it has powerful antioxidant and anti-inflammatory properties.

Like all antioxidants, it patrols your body looking for free radicals (the nasty molecules that give you wrinkles and dark spots). When it spots one, it goes on the attack and neutralises it before it can wreak its aging damage.

Plus, it soothes inflammation, another of the main causes of premature aging. But it soothing properties do more than keeping wrinkles at bay for longer. Quercetin also helps with eczema.

But, let’s be clear: fighting free radicals and soothing inflammation help PREVENT, not treat, wrinkles and dark spots. Don’t believe brands that tell you otherwise.

One more thing: Quercetin is a powerful antioxidant, but it’s not the best. There is no best. Just like your body needs more than just kale, your skin needs more than one antioxidant to stay healthy and strong.

By all means, add it to your skincare routine. Just don’t rely only on it. The more antioxidants you use, the better.

Related: The Most Common Antioxidants In Skincare


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Can Quercetin Fade Away Dark Spots?

Scientists are always looking for innovative ways to treat dark spots. Because the treatment available now either don’t work for everyone or are harsh and irritating. Some may even make your skin blue (I’m talking to you, Hydroquinone).

Polyphenols have powerful anti-aging properties, so researchers are wondering if quercertin can go the extra mile and fade away dark spots, too.

Unfortunately, it doesn’t. A 2016 study concluded that “quercetin itself is shown to be ineffective for hypopigmentation of human skin”. Bummer!

Related: Battle Of The Skin-Lightener: Which Is The Best Alternative To Hydroquinone?

What Else Does Quercetin Do In Skincare Products?

This is not as exciting as preventing wrinkles (unless you’re a skincare nerd), but it’s worth mentioning, too.

A 2010 study show that Quercetin can slow down the degradation of unstable UV filters Avobenzone and Octinoxate – and it does it better than common stabilizers Octocrylene and vitamin E! 

Why this matters? The faster these UV filters degrade, the sooner the sun protection of your sunscreen expires. Used alone, Avobenzone is effective for less than 2 hours!

You don’t want to reapply sunscreen every 30 minutes. Adding stabilisers like Quercetin helps your sun protection last a little bit longer.

Related: Do You Really Need To Reapply Sunscreen Every Two Hours?

paula's choice super-light daily wrinkle defense spf 30 review

What Are The Best Skincare Products With Quercetin?

Korres may have made quercetin famous, but my fave skincare products with this antioxidant come from other brands (sorry, Korres!):

Does Quercetin Have Any Side Effects?

Quercetin is safe for skin. Everyone can use it (unless you’re allergic to it, obvs). But, it shows minor cytotoxicity (the quality of being toxic to a cell).

Translation: it’s safe in the small concentrations used in skincare. But you probably wouldn’t want to use a serum with 20% Quercetin (not that I’ve ever seen one). More isn’t always better in skincare.

The Bottom Line

Quercetin isn’t the miracle worker Korres claims it is (surprise, surprise!) but it can help you keep wrinkles at bay. I’m a fan.

Have you ever used products with Quercetin? Share your experience in the comments below.