Quercetin is a flavonol, a type of plant compound, that may protect against heart disease and cancer. It is found in many fruits and vegetables including apples, broccoli, blueberries, and onions. It is also sold in supplement form.
Quercetin has been studied for its possible benefits for some types of cancer. It may help relieve symptoms of allergic rhinitis (hay fever) and asthma, and it appears to be helpful in treating the common cold. The effects of quercetin for other conditions are unclear.
It increases the activity of some enzymes in white blood cells. This change may help protect against infections such as colds and flu, but it also can cause potentially serious conditions like lupus. Quercetin seems to affect immune system function in a way that reduces inflammation and allergic reactions. It helps with blood cholesterol levels, possibly by blocking a specific enzyme that helps make “bad” LDL cholesterol. It seems to help prevent and treat some types of cancer.
Some experts recommend taking quercetin with meals. It is often used in combination with other dietary supplements for immune system support or cancer prevention. Quercetin can be taken as a pill, powder, or liquid extract.
Quercetin is generally considered safe for most people. However, it can cause side effects in some individuals and should be taken with caution by those who have certain conditions.
Possible Side Effects: diarrhea; headache, dizziness or fatigue; skin rash or itching; stomach upset or nausea.
Here are the best quercetin brands out there today:
8. Amazing Nutrition Amazing Formulas Quercetin 500 mg
This is a great quercetin supplement that comes in the form of 500mg capsules. It contains 100% pure Quercetin and this product is manufactured by Amazing Nutrition, which operates under high management standards to ensure you get the best quality supplements. This formula supports cardiovascular health and can help strengthen the immune system. This product is laboratory tested to ensure that it contains no contaminants, which means you will get nothing but the best from this brand. The recommended dose is 2 capsules per day with meals, and one bottle can last up to 25 days depending on your dosage.
7. Thorne Research – Quercetin Phytosome
Thorne Research Quercetin Phytosome is a vegetarian capsule that provides 250mg of quercetin from organically grown fruits and vegetables. It also contains vitamin C, which helps improve the absorption of quercetin. This product is suitable for vegetarians and vegans.
6. Pure Encapsulations – Quercetin 250 mg
Pure Encapsulations – Quercetin 250 mg is a quercetin supplement that features a high-quality formulation. This formula contains only the highest quality ingredients available. It provides 250mg of pure, vegetarian, and gluten-free Quercetin per serving. Pure Encapsulations supplies these supplements in non-GMO vegetable capsules.
This product is 100% pure and manufactured under strict GMP guidelines. It does not contain additives, fillers, or other unnecessary substances. The formula is made with a vegetarian capsule (cellulose), which ensures that it contains no animal ingredients or derivatives. It’s hypoallergenic and contains no wheat, gluten, or soy.
This vegetarian capsule also ensures that there is nothing in the product to harm your stomach or intestines. The capsules are easy on the digestive system so they can be taken without any side effects. It does not contain lactose, corn oil, gluten, soy protein, or sugar. It is also free of magnesium stearate and silicon dioxide (commonly used in the supplement industry as fillers).
This product contains no artificial colors, flavors, or preservatives. The capsules themselves are made with vegetable gelatin and purified water. They are manufactured at a facility that uses no animal products and is GMP compliant. The supplement undergoes independent third-party testing to ensure purity, potency, and quality.
5. Solaray Quercetin Capsules
Solaray Quercetin capsules are made from a blend of plant extracts that may help support your health. Each of the ingredients included in these capsules has been carefully selected for their potential benefits and ability to work together. The combination of ingredients in these capsules may help maintain a healthy immune system and support your heart.
4. Life Extension Optimized Quercetin
Life Extension Optimized Quercetin is scientifically formulated to provide high potency levels of this flavonoid. It also contains a unique formula that supports the defense system against oxidative stress, and it promotes healthy blood vessels by reducing inflammation, promoting healthy cholesterol levels, and supporting cardiovascular health. The product contains pure quercetin and is free of gluten, soy, wheat, and milk proteins.
3. Source Naturals Activated Quercetin
Source Naturals Activated Quercetin is a ground powder of quercetin that contains no fillers or additives and won’t cause stomach upset. The first ingredient in the formula is high-quality, pharmaceutical-grade quercetin derived from corn (non-GMO). It has 200 capsules per bottle.
2. Solgar Quercetin Complex with Ester-C
Solgar Quercetin Complex with Ester-C is a high potency blend of quercetin and vitamin C. It features pure, naturally sourced ingredients to support cardiovascular health, antioxidant defense, and immune system health. The product contains no artificial colors or preservatives and is guaranteed gluten-free. Solgar Quercetin Complex with Ester-C has no artificial colors or preservatives.
1. Doctor’s Best Quercetin/Bromelain
Doctor’s Best Quercetin/Bromelain is a supplement that offers support for immune system health. It also provides a range of other benefits, including a reduction in pain and inflammation. Doctor’s Best Quercetin/Bromelain contains quercetin and bromelain, two natural substances that can help to improve the body’s response to physical stress and inflammation.
The recommended dose for Doctor’s Best Quercetin/Bromelain is one of each tablet daily with a meal or as directed by your healthcare practitioner. It comes in bottles of 90 capsules.
In sum, the explanations given above will provide you with a better understanding of what quercetin is and how it works. Quercetin is considered one of the most powerful antioxidants known to science. As an antioxidant, it helps your body fight free radicals which are highly damaging to cells and tissues in the body. By consuming quercetin you are helping to prevent and treat a wide range of illnesses, conditions, and diseases. For maximum health benefits be sure to take regular doses of quercetin supplements.
Disclaimer: The information contained on this site is intended for educational purposes only and is not a substitute for advice, diagnosis, or treatment by a licensed physician. It is not meant to cover all possible precautions, drug interactions, or adverse effects. You should seek prompt medical care for any health issues and consult your doctor before using alternative medicine or making a change to your regimen.