HomeBuying GuidesHealth & BeautyHow To Buy The Best Quercetin Supplements

How To Buy The Best Quercetin Supplements

Best Quercetin Supplements

Looking to buy the best Quercetin Supplements ? Check out our guide below and you’ll be well-placed to select the right one for you.

The name quercetin may be unfamiliar to you, but the benefits it may provide are. This plant flavonoid contains antioxidant characteristics and can be found in a variety of seeds, flowers, fruits, and vegetables. Antioxidants have long been known to protect cells from free radical damage. While there is little scientific evidence to back up the claims regarding quercetin’s health benefits, certain clinical trials have indicated it can reduce inflammation, which can occur in a variety of health disorders and diseases.

Quercetin can be obtained in the form of supplements in addition to consuming a healthy diet that includes a variety of plant-based foods. Quercetin supplements are prepared with flavonoids, vitamins, and plant extracts and are available in capsule, powder, and liquid form. Although these supplements should never be used in place of medical advice or prescribed pharmaceuticals, they may help alleviate a variety of symptoms associated with various conditions by reducing inflammation in the body.

What are flavonoids, and what do they do?

Flavonoids are plant-derived chemicals that help cells by strengthening them and shielding them from free radical damage. Yellow lemons, white onions, and red raspberries are just a few examples of fruits and vegetables that contain these chemicals, which also give them their colours. One of these flavonoids, or plant pigments, that is high in antioxidants is quercetin.

Free radicals vs. antioxidants

It’s crucial to understand how antioxidants operate in order to see how taking a quercetin supplement could benefit your health.

Free radicals are chemicals that can harm cells, resulting in a variety of disorders such as cancer and heart disease. They occur in the body as a result of the metabolic process, particularly when people eat unhealthy diets high in trans fats, processed foods, and sugar. Free radicals can also be caused by environmental factors such as pollution, radiation, cigarette smoke, and different chemicals. A high quantity of free radicals in the body can cause oxidative stress, which can result in inflammation as well as a variety of symptoms, maladies, and diseases.

Antioxidants are responsible for reducing or eliminating free radicals’ ability to cause cell harm. Antioxidants can be found in a variety of foods, including fruits, vegetables, cereals, and seeds. They’re also found in dietary supplements like quercetin in high amounts.

Supplements containing quercetin may provide therapeutic benefits.

The anti-inflammatory properties of antioxidant-rich supplements like quercetin may also help to alleviate symptoms and guard against the development of certain diseases. This is because inflammation is thought to play a role in the development of many diseases. While quercetin pills aren’t a cure-all, they can aid with a variety of health issues.

Allergies are caused by the body’s immunological response to various aggravators. The antioxidant and anti-inflammatory properties of quercetin can help with allergy symptoms.
Arthritis is a painful condition in which the joints of arthritis sufferers become inflamed. Supplements like quercetin may help to reduce inflammation and pain.
Infections: Immunity improves when the body has fewer free radicals and less inflammation. Quercetin may help fight a number of diseases, including viral, urinary tract, respiratory, and sinus infections, by addressing these problems.
Athletic performance: Quercetin’s anti-inflammatory effects may boost energy levels in some users, resulting in improved performance.
Blood sugar: A decrease in inflammation may boost blood flow, which can help the body control sugar levels in the blood.
Adding extra antioxidants to your body may kill off some cells that could transform into cancer, even though quercetin isn’t a medically recognised cancer prevention or treatment.
Heart disease: Including antioxidants in your diet can help you live a healthier life. This is due to the fact that free radicals can induce cardiovascular disease.

Remember that using quercetin pills alone will neither prevent or cure health problems, nor will it provide complete anti-inflammatory protection. However, pairing them with a healthy diet that includes other fruits, veggies, and whole grains will likely increase your antioxidant intake and help your body fight disease.

Forms and properties of quercetin supplements

You’ll find capsule, powder, and liquid versions of quercetin supplements when you look through the many brands and formulas. The smooth coverings on capsules make them simple to swallow. Children’s chewable formulae are available from a few brands. Quercetin powder is designed to be blended into beverages or added to foods. Drops and sprays are two types of liquid supplements.

To improve their antioxidant benefits, certain quercetin supplements are combined with other components such as more flavonoids and plant extracts. Bromelain, an enzyme found in pineapple stems, is frequently added to quercetin tablets to improve absorption. Another typical supplement that can help increase immunity is vitamin C.

GMOs, preservatives, artificial additives, sugar, gluten, or animal ingredients are all avoided in many high-quality quercetin brands.

The dosage of quercetin varies based on the brand and potency, but for the most part, two capsules per day is recommended. Some high-strength choices, on the other hand, just require one dose every day.

The powdered and liquid forms of the supplement have the same daily dose, which is usually one or two scoops, sprays, or drops per day.


The efficacy of quercetin varies depending on the brand and dosage. Regardless of whether the supplement is in capsule, powder, or liquid form, most brands range between 500 and 1,200 milligrammes per recommended daily dose for adults. Quercetin amounts in children’s formulas are substantially lower, at around 100 milligrammes per day.


Take quercetin supplements only as directed. The daily dosage will be mentioned on the container label and should be strictly adhered to.
Before taking quercetin or any other supplement, consult your doctor if you have any undiagnosed health concerns or symptoms.
Children should not be given quercetin made for adults.
With a glass of water, take your quercetin supplements. This will speed up the absorption of the supplement and make the capsules simpler to take.
Some drugs may interact with quercetin, reducing its effectiveness. Before adding quercetin to your diet, consult your doctor if you are on any medications.
Do you dislike taking pills? Consider taking a liquid or powdered quercetin supplement. Some companies also sell capsules that just need to be taken once a day to get the full dose.
Look for supplements created by reputable companies that put their products through rigorous testing and employ high-quality components. Cheaper items could not have the most pure and effective components.


What does the Food and Drug Administration say about quercetin supplements?
The Food and Drug Administration (FDA) does not regulate dietary supplements or make claims or recommendations about their use to address medical issues. However, certain clinical and academic investigations on quercetin support its anti-inflammatory properties.

Should quercetin supplements be avoided by some people?
Quercetin oral supplements are unlikely to cause unfavourable reactions or side effects in the majority of people, however it has been linked to digestive issues in some people. Tingling feelings in the extremities and headaches are also possible adverse effects. Furthermore, while taking high doses of bromelain, some patients with high blood pressure may suffer an increase in heart rate. If this is a concern, look for a quercetin supplement that does not contain bromelain. Quercetin should not be consumed by pregnant or breastfeeding women.

How much quercetin should I consume on a daily basis?
It’s recommended to start with a low dose of quercetin if you’re new to it. Adults should start with 500 milligrammes once a day and gradually increase to twice daily. Higher doses are also available, although surpassing 1,200 mg may cause side effects including nausea or diarrhoea, especially in sensitive people. Furthermore, exceptionally high doses used over a long period of time may induce kidney damage.

Is it possible for quercetin to cause hypothyroidism?
Concerns have been raised concerning the possible toxicity of excessive quercetin use, and multiple studies have shown that flavonoids, including quercetin, can disrupt thyroid function. We previously discovered that quercetin decreases thyroid cell proliferation and iodide uptake in a previous study.

What is the best way to consume quercetin powder?
Quercetin should be taken once or twice a day, at doses ranging from 75 to 250 mg. It can be dissolved in water, consumed as a capsule, or washed down with a glass of water as a powder. Headaches, nausea, and tingling feelings are some of the moderate side effects that have been observed.

Who isn’t supposed to take quercetin?
You should take a vacation from quercetin on a regular basis. Quercetin should be avoided by pregnant women, breastfeeding mothers, and persons with kidney condition. There have been instances of renal injury at doses greater than 1 g per day.

Is it safe to take quercetin on a daily basis?
When administered orally: When used in moderation, quercetin is probably safe for most people. Quercetin has been used successfully for 12 weeks in doses up to 1 gramme per day. Long-term use or greater doses are unknown to be safe.

Is quercetin good for your immune system?
This antioxidant, which can be found in a variety of foods, may help to strengthen your immune system. Quercetin is a flavonoid that may help to boost your immune system.

Does quercetin cause weight gain?
In addition to lowering inflammation, quercetin aids in the effective burning of sugar and fats, which helps to prevent weight gain. Another significant study shown quercetin to have a direct anti-obesity impact.

What are the negative consequences of quercetin?
The following are some of the most common quercetin adverse effects:
Headache (oral use)
tingling and numbness (oral use)
Breathing problems (intravenous use)
Vomiting and nausea (intravenous use)
Kidney injury (more than 945 mg/m2 intravenous usage)

Is quercetin a source of energy for you?
Recent research suggests quercetin can improve endurance, increase VO2 max (aerobic capacity), combat tiredness, strengthen the immune system, and reduce exercise-induced damage in the body, making it an ideal supplement for athletes or anybody who pushes their body to its limits.

Is quercetin good for your mood?
Because of its antioxidant, anti-inflammatory, and neuroprotective properties, quercetin has antidepressant-like effects.

Is quercetin a good anti-anxiety supplement?
Dietary intake or supplementation of the natural flavonoid quercetin has been proven to be effective in alleviating anxiety-related symptoms in studies.

Best Quercetin Supplements to buy

SaleBestseller No. 1
Quercetin 500mg High Strength Antioxidant Supplements (6 Months Supply) 180 Vegan Pure Quercetin Capsules Easy to Swallow - One A Day - Gluten Free & Non-GMO, Made in UK by New Leaf
  • PURE QUERCETIN 500MG - Each capsule of vegan Quercetin supplement contains 500mg of Quercetin. Our Quercetin capsules contain Sophora Japonica which is derived from from Japanese Cord Tree Flower Extract and Bromelain,Bioflavonoids and are naturally present in fruit, vegetables and herbs, and are a class of powerful phytochemicals. They help maximise the benefits of Vitamin C as they prevent the breakdown of this immune supporting vitamin in the body
  • QUERCETIN IS NATURALLY HIGH IN ANTIOXIDANT AND BIOFLAVONOIDS - When you are looking for an antioxidant supplement, flavonoids supplements New leafs Quercetin is all you need. You'll be surprised to know that Quercetin is a more potent and trusted antioxidant source compared to Vitamin C
  • HIGH STRENGTH FORMULA SIX MONTH SUPPLY – Each serving of just ONE capsule provides 500mg of pure Quercetin derived from Sophora Japonica extract. Each bottle contains 180 tablets that will last for six months.
  • VEGAN & GLUTEN FREE – Our Quercetin supplements are proudly manufactured in the UK and contain only high-grade ingredients to ensure they're gut friendly and suitable for vegans.
  • PREMIUM QUALITY STANDARDS – Manufactured in the UK whilst adhering to GMP standards. Each product in our range is back by science, therefore we only use the highest quality ingredients in the correct dosages and formats to bring better health to everyone, throughout all stages—from raw material to delivery.
Bestseller No. 2
Pure Encapsulations - Quercetin 250mg - Natural Plant-Source Pure Quercetin Supplement - 60 Vegetarian Capsules
  • Active Ingredient: Features pure quercetin derived from a natural plant source. The recommended dosage of this Quercetin supplement is 2-4 capsules daily, in divided doses, with or between meals, or as directed by a healthcare professional.
  • Plant Extract: Intake of quercetin supplement contributes to providing a highly bioavailable form and cellular support
  • 60 Days of Supply: Aside from just a high strength of Special formulas, this supplement also assists with normal function of the immune system
  • Pure Quality: Our quercetin vitamin are made with only premium ingredients sourced from trusted suppliers and guided by our nutritional experts, then carefully manufactured and tested to verify their potency and purity.
  • Pure Difference: All Pure Encapsulations products are FREE FROM wheat, eggs, tree nuts & peanuts, gluten, artificial colours, flavours & sweeteners, coatings and shellacs, GMOs, unnecessary binders, fillers & preservatives.
Bestseller No. 3
Quercetin 500 mg x 50 Tablets Double Strength Antioxidant Supplement Immune Health
  • Powerful antioxidant
  • Anti-inflammatory effect
  • Stimulates the immune system
  • Relieves allergy symptoms
  • Slows down the aging process
Bestseller No. 4
Ultra High Purity Quercetin Capsules - 95%+ Highly Purified and Highly Bioavailable - 1000mg Per Serving - 120 Capsules Quercetin Supplement
  • The Highly Purified Form of Quercetin - Toniiq Quercetin Capsules contain 1000mg of the highest quality quercetin powder in each serving– ethically sourced, grown and cultivated using an extraction process to ensure 95% standardized purity (other quercetin 500mg and quercetin 1000mg extracts contain 70% or less).
  • A Key Active Ingredient - Quercetin has amazing health benefits, but purity has always been a major challenge for this flavonoid; something most other quercetin supplements don’t provide as it requires an extra step (and expense) in the manufacturing process. At 95% purity levels, Toniiq Quercetin provides one of the purest and most potent quercetin extracts available.
  • Setting a New Standard for Purity - To ensure that you are getting the highest-quality product, each batch is tested for quality and purity both during and after manufacturing.
  • Quality, First, and Foremost - Toniiq products are produced in a GMP-certified and NSF-approved state-of-the-art manufacturing facility in the USA.
  • Each Batch is Individually Tested - We test each batch both ourselves and through a third-party independent laboratory to ensure our ingredients contain the correct standardized level of purity and active ingredients. We also test each batch for any possible additives, contaminants, and impurities to ensure the highest level of quality.
Bestseller No. 5
Quercetin 316 mg x 120 Capsules 4 Month Supply, High Bioavailability Natural Immune Health Supplement
  • ACTIVE INGREDIENT: Features pure quercetin derived from a natural plant source
  • DOUBLE STRENGTH : 316 mg per capsules, unlike most products in the market are only 175-200 mg
  • PROVIDES PROTECTION against free radical damage
  • THE COMPANY IS CERTIFIED as class "A" leader in its size category and sector of activities. Manufactured under a strict GMP code of practice
Bestseller No. 6
Double Wood Quercetin Supplement with Bromelain | 120 High Strength Capsules - 1000mg Quercetin & 200mg Bromelain per Serving | Quercetine Antioxidant Supplements | Non-GMO & Gluten Free
  • GREAT VALUE SUPPLEMENTS FROM DOUBLE WOOD - Each bottle contains 120 capsules, and with a daily serving of 2 capsules providing 1000mg of Quercetin and 200mg of Bromelain, you will get 2 months supply from this bottle
  • QUERCETIN - Quercetin is a plant pigment or otherwise known as a flavanoid. It's found in multiple plants and also food sources including red wine, onions, green tea, apples, berries, seeds and grains. It has a distinct bitter flavour and is used not only in supplements but also within foods and drinks.
  • THE BENEFITS OF OUR SUPPLEMENTS - Our Quercitin capsules are gluten free and made with Non GMO ingredients
  • ABOUT OUR QUERCITIN - Our Quercitin, and all Double Wood supplements, are sourced from GMP certified FDA approved facilities.
  • THIRD PARTY TESTED AND MADE IN THE USA – Our Quercitin capsules are third party tested and manufactured in the USA before being tested by Health Level One for purity and potency verification.
Bestseller No. 7
NUTRITZEN QUERCETIN - 60 Tablets 250mg - Natural Health Supplement - Immune Support - Relieves Allergies - Gain Energy - Made in UK
  • Is your immune system weak from lockdown? Do you suffer from allergies at this time of the year, blocked nose! itchy throat! watery eyes! Does that sound familiar?
  • Help is now available with our Nutritzen Quercetin Capsules. Quercetin is a natural beneficial flavonoid derived from the Sophora Japonica flower. It has proven antioxidant and antihistamine properties. This is a premium quality product that gets results
  • HIGHEST QUALITY UK MANUFACTURED : These capsules contain pure Quercetin derived from a natural plant source. They are proudly manufactured in the UK to the highest quality standards. Our Vegan safe capsules are not flown in from far away places, which means that you're getting the best quality Quercetin on the market.
  • DOSAGE: Our all natural formula is suitable for adults over the age of 18 (please check the bottle for details). 1 -2 tablets taken daily will help improve energy levels, reduce inflammation and allergies without making you feel drowsy. Imagine being able to enjoy the outdoors without any side effects!
  • OUR PROMISE: Nutritzen is a family run business with a passion to provide superior supplements. You can guarantee that when you order a bottle of Nutritzen Quercetin 60 capsules you will benefit from the best quality ingredients available to us. Order today and start enjoying the benefits immediately.
Bestseller No. 8
QUERCETIN + Bromelain and Vitamin C High Dosage - Quercetin Complex Made in Italy, Antioxidant Supplement and Immune Booster - Dulàc Nutrition, 60 Tablets (2 Months Supply)
  • ✅ High concentration: one tablet contains 200 mg of natural Quercetin (equivalent to maximum daily requirement), 250 mg of Vitamin C, 25 mg of Bromelain + Bio-flavonoids
  • 💪 Antioxidant and Immune System support supplement. The tablets are easy to swallow and the greenish-yellow colour is typical of quercetin powder
  • 🍃 Quercetin is a flavonoid present in many plants; it can help in case of allergies, seasonal ailments and has anti-inflammatory properties. Associated with Vitamin C it also has an antiviral action
  • 😉 Bromelain has anti-inflammatory, antioxidant and immunomodulating properties, while bioflavonoids prevent the oxidation of vitamin C increasing its effectiveness
  • 🇮🇹 100% Made in Italy, developed in collaboration with national and international pharmaceutical experts, so as to offer our customers a product of proven quality
Bestseller No. 9
Global Healing Plant-Based Quercetin Supplement To Support Immune System Function, Respiratory Health & Body's Natural Anti Histamine Response To Occasional Allergies - Non Drowsy - 250mg, 60 Capsules
  • Most Activated Form of Quercetin - Phytosome technology is able to enhance quercetin absorption by more than 20x. Made from the flower extracts of Sophora Japonica plant to be the most bioavailable antioxidant flavonoid for rapid response to histamines.
  • Healthy Response To Histamines - Powerful antioxidant that supports your body's response to histamines & allergies, which helps ease and control occasional symptoms like itching, redness, runny nose, and excessive mucus for natural respiratory health.
  • Immune Support - Provides antioxidants to protect healthy immune cells from oxidative damage. Great potential to strengthen the immune system by promoting an effective response to harmful organisms to reduce the chances of feeling under the weather.
  • Cardiovascular Health - Flavonoids like quercetin help encourage healthy blood flow for normal circulation and pressure for stabilization. Anti-oxidative properties help ease oxidative stress and have a protective effect on cardiovascular health.
  • Manufactured In The USA - Quercetin is manufactured in our own, state-of-the-art cGMP certified facility in Phoenix, Arizona. We pride ourselves on quality, which is why all bottles come with a 1-year guarantee, produced right here in the USA.
Bestseller No. 10
NUTRITZEN QUERCETIN with Vitamin C for Immune Support - 90 Vegan Capsules 500mg - Natural Health Supplement - Natural Antihistamine - High Strength - Fights Allergies - Improve Energy
  • NATURAL INGREDIENTS: Quercetin comes from the Sophora Japonica flower. This is regarded as the premium form of Quercetin (quercetin dihydrate). It is a rich yellow colour - exactly as it should be! Vitamin C is well known to fight colds and flu, tiredness and fatigue and contributes towards a healthy. This is a powerful combination.
  • VEGAN SAFE: Our capsules are made from HPMC so suitable for Vegetarians and Vegans. They are gluten, allergen and preservative free and have no artificial ingredients fillers or binders or any other nastiness. All our supplements are easy to swallow, easy to digest and full of natural goodness.
  • DOSAGE: Our all natural formula is suitable for all adults over the age of 18 (please check the bottle for details). One 500mg tablet helps the maintenance and support of a healthy immune system without making you drowsy.
  • MADE IN UK: Our capsules (not tablets) are proudly manufactured in the UK to the highest quality standards. They are not flown in from far away places. This means, once again, that you're getting the best quality quercetin and vitamin C on the market.
  • OUR PROMISE: Nutritzen is a family run business with a passion to provide superior supplements. You can guarantee that when you order a bottle of Nutritzen Quercetin with Vitamin C you will benefit from the highest quality ingredients available to us. Order today and start enjoying the benefits immediately.

Honest Bob is committed to providing genuine guides from a panel of experts. As an Amazon affiliate Honest Bob earns commission from any qualifying purchases.Thank you for your support!

Must Read