What Are the Best Quercetin Supplements?

The Best Quercetin Supplement Brands for 2023

The best quercetin supplement brands are:

Why do people take Quercetin supplements? For several reasons, including to supporting their immunity, help with allergies, fight inflammation, and for its senolytic effect to help with healthy aging.

I was interested to find out what are some of the best quercetin supplements on the market for me to review.

So, I went out researching online for what are some of the highest rated & most recommended quercetin supplement products and brands available to buy online.

What Is the Best Quercetin Brand on the Market?

Thorne is the best quercetin brand on the market, because their Quercetin Phytosome product uses the form of quercetin that has the best bioavailability backed by research, their products are NSF Certified Supplements and trusted by lots of major professional and amateur US sporting teams and players.

---

The Best Quercetin Supplements in 2024

Here is a list of recommended quercetin supplements on the market we reviewed for you to compare.

---

1. Thorne Quercetin Phytosome Capsules

Thorne is a leading supplement brand based in the US who provide a big variety of NSF certified supplements. The company sell quercetin in a phytosome form which comes in capsules. Unfortunately they do not provide a certificate of analysis from third party testing laboratories to confirm purity of their products on their pages. You can also buy their Thorne Quercenas product which combines bromelain to act as a an enhancer for absorption and possible aid in reducing swelling and discomfort. During hayfever (allergy) season they say you can take up to 3 capsules over the course of the day with meals.

---

2. Renue By Science Lipo-Quercetin Capsules

RENUE BY SCIENCE is a leading anti-aging supplement brand based in the US who provides certificate of analysis from third party testing laboratories to confirm purity of their products. The company sell quercetin in a liposomal form which comes in capsules. We feel they are the best liposomal quercetin supplement option on the market. You can also buy their Activator AM product which combines liposomal spermidine, liposomal quercetin and liposomal fisetin to act as a senolytic and AMPK activator.

---

3. ProHealth Longevity Quercetin Bromelain Complex Tablets

ProHealth Longevity is another leading anti-aging supplement brand based in the US that has been in operation for 35+ years. They provide a certificate of analysis from third party testing laboratories to confirm purity of their products. The company sell quercetin dihydrate and combine it with bromelain to enhance bioavailability. They have a unique option to speak to a nutrition advisor through their website.

---

4. Do Not Age Pure Quercetin Capsules

Do Not Age is a leading longevity supplement brand based in the UK who provide certificate of analysis from third party testing laboratories to confirm purity of their products. The company sell 100% quercetin dihydrate in capsules. They are the best bulk quercetin supplement option which is good for people who want a longer term supply.

---

5. Double Wood Supplements Quercetin Capsules

Double Wood Supplements is a US based brand that sells popular anti-aging supplements. They provide a certificate of analysis from third party testing laboratories to confirm purity of their products. The company sells quercetin dihydrate blended with bromelain and quercetin dihydrate blended with zinc options. You can get capsules and gummy options. They worked out the best price per capsule out of all brands reviewed at the time of looking.

---

6. NOW Foods Quercetin 500 mg Capsules

NOW Foods is a US based brand that has been making supplements for over 55 years. They do not provide a publicly available certificate of analysis from third party testing laboratories on their product pages to confirm purity of their products. NOW is a good choice if you a looking for a quercetin supplement available on Amazon.

---

7. Life Extension Optimized Quercetin Capsules

Life Extension is a US brand from Florida that sells the largest selection of different types of quercetin products. This product uses quercetin dihydrate, but you can also buy their Bio-Quercetin that is quercetin phytosome. They also sell other quercetin product options blended with vitamin C, resveratrol, fisetin, niagen nicotinamine riboside, bromelain and others. They do not provide a publicly available certificate of analysis from third party testing laboratories on their product pages to confirm purity of their products. However, I trust them as when looking at the ingredients and amounts they source in their other products it has always been linked to research.

---

How to Choose a Quercetin Supplement

These are the things to consider before buying an quercetin supplement:

1. Does the brand provide a certificate of analysis to prove purity and validation that it contains the amount of active ingredient as advertised per serving dose
2. What is the dose per serving to make sure you get the amount of quercetin that you want
3. What type of form does the quercetin come in e.g. powder, tablet, capsule, sublingual liquid etc…
4. Are there any other active ingredients in the product that you want or not
5. What is the cost per serving to see which product is the best deal or most cost effective for you
6. What is the shipping policy of the brand to make sure you can get it delivered to you
7. Do people mention the brand as a recommended choice on popular online forums

Why Take an Quercetin Supplement?

One of the main reason people take a quercetin as a dietary supplement is for its antioxidant properties to help support your immune system. Also people use it as needs during Summer months to help reduce some allergy symptoms derived from pollinosis (hay fever allergies).

Other reasons we can see becoming more popular is its possible senolytic effect which helps to remove senescent cells that is a goal in healthy aging and healthspan. Other areas of research include anti-thrombotic, anti-inflammatory, and anti-neoplastic properties.

What Are the Types of Quercetin Available?

There are two types of quercetin available in supplement form:

1. Quercetin Phytosome
2. Quercetin Dihydrate

What Are the Benefits of Using Quercetin?

The potential beneficial effects of quercetin include:

• Antioxidant Properties
• Antimicrobial Properties
• Anticarcinogenic Properties
• Anti-inflammatory Properties

What Are the Recommended Quercetin Dosages?

The suggested for dosage for quercetin supplementation is between 500 – 1000 mg per day by mouth.

We did read that research-administered drug dosages of up to 2000 mg per day showed mild to no symptoms of overdose.

However, always consult your local physician before starting any new supplement program.

What Are the Natural Food Sources of Quercetin?

Some of the foods that contain the most quercetin include:

• Capers
• Onions
• Dill
• Oregano

Is Quercetin Safe?

The studies of quercetin supplements reviewed by the NIH Office of Dietary Supplements didn’t find any side effects in athletes who took it, but they caution it still hasn’t been studied enough to know if it is really safe to take.

The safety of taking a dose of 1000 mg or more of quercetin per day for 12 weeks or longer is not currently available.

What Are Possible Side-Effects from Taking Quercetin?

Here is a list of possible side effects when taking a quercetin supplement:

• Gastrointestinal discomfort including nausea, vomiting and diarrhoea with doses over 1 gram
• Quercetin may interact with certain drugs, leading to altered drug bioavailability

Quercetin Supplements Frequently Asked Questions

Sources

• Yamada et al. 2022. Effects of repeated oral intake of a quercetin-containing supplement on allergic reaction: a randomized, placebo-controlled, double-blind parallel-group study.
• Zoico et al. 2021. Senolytic effects of quercetin in an in vitro model of pre-adipocytes and adipocytes induced senescence.
• Hwang et al. 2018. Investigation of quercetin and hyperoside as senolytics in adult human endothelial cells.
• Riva et al. 2019. Improved Oral Absorption of Quercetin from Quercetin Phytosome®, a New Delivery System Based on Food Grade Lecithin.
• Michala et al. 2022. Quercetin: A Molecule of Great Biochemical and Clinical Value and Its Beneficial Effect on Diabetes and Cancer.
• Andres et al. 2018. Safety Aspects of the Use of Quercetin as a Dietary Supplement.

Related Products

• Nicotinamide Mononucleotide (NMN)
• Nicotinamide Riboside (NR)
• Nicotinamide Adenine Dinucleotide (NAD)
• Spermidine
• CoQ10
• Oxaloacetate
• Resveratrol