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Quercetin, a potent antioxidant located in a number of plant-based foods, is one of the healthiest ingredients we could ever wish to consume. It's a flavonoid that functions as a potent antioxidant, as well as a natural antihistamine, and a natural anti-inflammatory as well. Read the full product description for more information.


What is Quercetin?

Quercetin is a flavonoid that functions as a potent antioxidant, as well as a natural antihistamine, and a natural anti-inflammatory as well. This potent antioxidant is located in a number of plant-based foods, especially in green leafy vegetables, and certain fruits such as berries and tomatoes. In actual fact, experts refer to Quercetin as a natural plant pigment, which is why it is located within brightly coloured fruits and vegetables. Although Quercetin is found in a number of healthy and natural food sources, many people also choose to supplement with Quercetin to ensure they are getting enough of this amazing nutrient. It can be used for treating heart conditions, hardened arteries, hypertension, high cholesterol levels, viral infections, and much more besides. Quercetin is, without a doubt, one of the healthiest ingredients we could ever wish to consume.

How does it work?

As Quercetin provides so many individual health benefits, it works in a whole variety of different ways. For example, as it functions as a powerful antioxidant, Quercetin helps to provide protection for the cells, helping to fight off and destroy free-radicals, which can cause cellular mutations and can cause our cells to turn cancerous. It does this by preventing a process known as oxidation, which can cause damage to the cells, in a similar way to how food turns rotten when it is exposed to oxygen. . The wonders of Quercetin don’t stop there however, as it also functions as an antihistamine, so it can help to treat and prevent allergies. Histamines are substances that cause irritation and minor damage to cells inside the body, which is why we get painful rashes and swelling when we do have an allergic reaction to something. Antihistamines function by preventing Histamines from damaging the cells, which is exactly what Quercetin does, making it ideal for allergy sufferers.

What are the benefits of using Quercetin supplements?

Some of the primary benefits of Quercetin supplements include the following:

Cardiovascular benefits

Quercetin is also very heart-friendly and is perfect for anybody that happens to be suffering with cardiovascular issues. The compound prevents the build up of plaque within the bloodstream, plus it helps to lower LDL cholesterol, which is a harmful cholesterol that coats the lining of the arteries. It also lowers blood pressure and has been found to strengthen the arteries.

Great for allergies

For people that suffer with allergies, such as hay fever during the spring and summer, or who are allergic to pets, Quercetin is perfect as it works as a natural antihistamine, helping to alleviate the symptoms associated with allergic reactions.

Other benefits include:

  • Strengthens the immune system
  • Provides cardiovascular benefits
  • Provides anti-inflammatory properties
  • Alleviates general aches and pains
  • Enhances endurance
  • Provides anti-aging benefits
  • And more...

How and when should it be consumed?

Health Canada Recommended Dose (capsules): Adults: 1 Capsule(s) 2 time(s) per day. Take with food/meals.

What can it be stacked with?

As quercetin is a supplement designed to promote general well-being, it stacks very well with supplements designed to provide similar effects. For example, quercetin stacks very well with: Vitamin C, multi-vitamins, Omega 369 supplements, and glucosamine.

Quercetin Ingredients

Ingredients Per Capsule

Medicinal Ingredients (per capsule): Quercetin (3,3',4',5,7-Pentahydroxyflavone, Quercetin, Styphnolobium japonicum - Flower) ................................. 500 mg
Non-Medicinal Ingredients: Gelatin.

Potential side effects

As with all supplements, always consult your doctor before using any new supplements, and discontinue usage immediately if you experience any adverse side effects or reactions. Pregnant and breastfeeding women should not use this product, as not enough is yet known about its overall safety. Although very safe and beneficial, some users have experienced adverse side effects when supplementing with quercetin, especially when the recommended daily intake was exceeded. Potential side effects associated with this product, include the following:

  • Headache
  • Nausea
  • Stomach cramps
  • Dizzy spells
  • Diarrhea
  • Tingling of the hands and feet
  • Mild numbness


Caution: Not intended for children, pregnant, or breastfeeding women. Consult a healthcare practitioner prior to use. Consult a healthcare practitioner prior to use if you have health conditions. Store in a cool dry place away from children. Do not use if seal is broken.

Allergen warnings

Allergy Statement: This product is made in a facility that handles milk products, gluten, shellfish, soy, peanuts and other tree nuts.

Disclaimer: The above description does not constitute medical advice and is for informational purposes only and has not been evaluated by Health Canada, CFIA, or FDA. Please consult a properly licensed medical professional before consuming nutritional supplements. This product is not intended to treat, diagnose or cure any disease.

Customer Reviews

Based on 25 reviews
Bennett Abbott



So happy with all Canadian Protein products.

Enough is enough!

Nice yellow colour. Good size and fair price. Really lousy resealable bag. Way too many emails requesting reviews of products purchased.

Barb Toner
Hemp protein

Very satisfied, excellent value and product!!

Sab Mutterer
Love this stuff

I like to keep my immune system in balance and this and NAC are regular ingredients in my smoothies. Excess inflammation is destructive to the body and in todays world we have an overload of toxins driving up our immune response. Although the nearly tasteless powder is very fine and moderately resists mixing in fluid, I would welcome a powder option to the capsules, if you guys could supply it. Good pricing, and much appreciate that I can buy pure
Quercitin here, as most others supply it in a combination formula only.