Best Quercetin Supplement: Dose, Form and Price Compared

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Quercetin is a plant compound found in fruits and vegetables, also sold as a supplement. The best human evidence is for blood pressure, where two meta-analyses found small drops of a few points. Plain quercetin is poorly absorbed, which matters when you compare products, and long-term safety at high doses hasn’t been studied well. We rate the evidence C. Read the quercetin guide first. This page compares the three quercetin products we have price and label data for.

Short answer: Best overall (US$): Thorne Quercetin Phytosome (NSF Contents Certified; the only US product with a verified price, and not like-for-like by milligram); Best budget (UK £): GOYU Quercetin 500 mg at Holland & Barrett (check the pack, the page contradicts itself on serving size); UK option: Pure Encapsulations Quercetin. Prices, testing and every shop are in the picks below.

How we rank

We only rank products that are in our product data file, and we use only what that file records:

1. Form and amount. Two products are plain quercetin (Pure Encapsulations at 250 mg a capsule and GOYU at 500 mg) and one is a phytosome (Thorne, 250 mg of quercetin with sunflower lecithin). A phytosome label lists the weight of the whole complex, not pure quercetin, so we show its price per 500 mg but it is not like-for-like.
2. Third-party testing, as listed. We note a named testing program (for example NSF Certified for Sport) when our data lists one. Where the data says “brand statement”, we say so and do not count it as verified by us.
3. Price per daily dose. We divide the pack price by the servings per pack, then scale to our basis: 500 mg of quercetin a day (or quercetin complex, as labeled), the level at which the blood pressure analysis in our guide split its trials. It is a price basis, not a recommended dose. Thorne’s 250 mg is a phytosome complex, not pure quercetin, so its figure counts two capsules and is not like-for-like. Prices in different currencies are not converted, so $ and £ are only compared within their own currency.

Winner labels. “Best overall” goes to the cheapest product with a named testing program in that currency. “Best budget” goes to the lowest price per daily dose in that currency, whatever the testing. “Best tested” is only used when one product lists clearly more named programs than the rest. If no product qualifies for a label, we leave that label out.

Unverified prices. Pure Encapsulations’ dollar price (Amazon.com) was read through a search tool, so the table marks it and no pick relies on it. That leaves Thorne as the only product with a verified US price, so no dollar Best budget is awarded.

Testing. Only Thorne has a named testing listing. No UK product does in our data, so there is no UK Best overall.

What we did not do. We have not tested these products ourselves, in a lab or by taking them. We did not rank by commission. Prices change, so each price shows the date it was checked. More in How we rank.

Price per daily dose

Basis: 500 mg of quercetin a day (or quercetin complex, as labeled), the level at which the blood pressure analysis in our guide split its trials. It is a price basis, not a recommended dose. Thorne’s 250 mg is a phytosome complex, not pure quercetin, so its figure counts two capsules and is not like-for-like. Every number below is worked out from the pack price, servings per pack and amount per serving in our product data.

US dollar prices ($)

Product (retailer)	Amount per serving	Pack price (checked)	Price per serving	Price per daily dose	Testing named in our data
Pure Encapsulations Quercetin 250 mg, 60 capsules (Amazon.com)	2 capsules: 500 mg quercetin (250 mg per capsule)	$22.98 (Nov 3, 2026; price read through a search tool, not on the shop page)	$22.98 ÷ 30 = $0.766	$0.766	None named
Thorne Quercetin Phytosome 250 mg, 60 capsules (Thorne)	1 capsule: 250 mg quercetin phytosome (quercetin with sunflower lecithin)	$46.00 (Nov 3, 2026)	$46.00 ÷ 60 = $0.767	$0.767 × 500 ÷ 250 = $1.53	NSF Contents Certified (Thorne Quercetin Phytosome is listed in NSF’s certified dietary supplement directory)
Thorne Quercetin Phytosome 250 mg, 60 capsules (PureFormulas)	1 capsule: 250 mg quercetin phytosome (quercetin with sunflower lecithin)	$46.00 (Nov 3, 2026)	$46.00 ÷ 60 = $0.767	$0.767 × 500 ÷ 250 = $1.53	NSF Contents Certified (Thorne Quercetin Phytosome is listed in NSF’s certified dietary supplement directory)

UK prices (£)

Product (retailer)	Amount per serving	Pack price (checked)	Price per serving	Price per daily dose	Testing named in our data
GOYU Quercetin 500 mg, 60 vegan capsules (Holland & Barrett)	1 capsule: 500 mg quercetin (from Sophora japonica), per the H&B description and directions	£11.78 (Nov 3, 2026)	£11.78 ÷ 60 = £0.196	£0.196	None named
Pure Encapsulations Quercetin 250 mg, 60 capsules (Healf)	2 capsules: 500 mg quercetin (250 mg per capsule)	£29.70 (Nov 3, 2026)	£29.70 ÷ 30 = £0.990	£0.990	None named

Special formulations such as phytosomes are sold to improve absorption. The quercetin guide covers what we found; we do not rank on absorption claims.

How to start

Fat and fiber in a meal roughly doubled absorption in studies, so taking it with food is a reasonable thing to ask a pharmacist about. Study amounts are not recommendations, and we found no adequate long-term data at high doses. The senolytic trial used quercetin with a prescription medicine under medical supervision and is not something to copy at home. The labels here give 250 mg (Thorne and Pure Encapsulations, per capsule) or 500 mg (GOYU, per capsule). See the quercetin guide.

Talk to your doctor or pharmacist

Talk to your doctor or pharmacist before you start any supplement, especially if you are pregnant or breastfeeding, take prescription medicine, or have a health condition. Ask first if you have kidney problems, have or have had an estrogen-dependent cancer, or take regular medicine, because quercetin may change how much of a drug is absorbed. The full guide has the evidence, safety notes and citations.