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Quercetin Dosage
There is no standard recommended dosage of quercetin. This is because various products may contain a different amount of the active component, making consistently safe and effective dosing difficult. A dose of 400 mg or 500 mg three times a day is commonly used. However, it is probably best to follow the dosing instructions on your particular quercetin product.
As is the case with many dietary supplements, there is no clearly established safe and effective dosage for quercetin at this time. As a result, there is little guidance to help people choose an appropriate quercetin dose.
There are a few different reasons why it is difficult to recommend a dosage of quercetin. Unlike for prescription or non-prescription drugs, there is no standard recommended dose for dietary supplements such as quercetin. Additionally, there may be significant variability of the content, purity, and strength among different brands of the same dietary supplement, making consistently safe and effective dosing difficult.
Because there is little high-quality information about dosing with quercetin, and because there may be significant variability in the active component content among various quercetin products, it is probably a good idea to follow the instructions on the label. A dose of 400 mg or 500 mg three times daily is commonly used.
Some considerations for people taking quercetin include:
- If you have any chronic health problems or take any prescription medications, it is probably a good idea to check with your healthcare provider before taking quercetin.
- If you decide to take a quercetin supplement, it is important to choose a trustworthy manufacturer (since supplements are not regulated as closely as drugs). Your pharmacist is a good source for information about which supplement manufacturers are most reliable.
- If you are unsure about anything related to your dosage or quercetin dosing in general, please talk with your healthcare provider.
Written by/reviewed by: Kristi Monson, PharmD; Arthur Schoenstadt, MD
Last reviewed by: Kristi Monson, PharmD