Our three quercetin picks
Choose Thorne Quercetin Phytosome if formulation disclosure and a third-party testing statement matter most. Choose Life Extension Quercetin 500 mg for the lowest regular cost per labeled serving. Choose NOW Quercetin With Bromelain only if you specifically want both ingredients and accept a two-capsule serving.
Prices were checked on official US product pages on August 27, 2026. Calculations use one-time or regular prices before sales, coupons, subscriptions, tax, and shipping. HealthPlugged does not use affiliate links in this guide and has no disclosed commercial relationship with these brands.
How we compared the products
We compared the named quercetin form, amount per full serving, capsules per serving, servings per bottle, added active ingredients, public testing statement, warnings, and current official price. We did not rank products by immune, allergy, antioxidant, or longevity promises because those claims require clinical evidence that matches the exact product and outcome.
The three picks occupy different decision slots. A lower milligram amount in a phospholipid complex is not directly equivalent to a higher amount of plain quercetin, and a quercetin-bromelain formula adds a second active ingredient rather than creating a better version of plain quercetin.
Three quercetin supplements compared
Official US product pages checked August 27, 2026.
| Product and fit | Form and dose | Serving and bottle | Price | Key distinction |
|---|---|---|---|---|
| Thorne Quercetin PhytosomeBest overall | Phospholipid complex, 250 mg | 1 capsule; 60 servings | $46; $0.77/serving | Named format and third-party testing statement |
| Life Extension Quercetin 500 mgBest value | Plain quercetin, 500 mg | 1 capsule; 100 servings | $29.24; $0.29/serving | Simple formula and lowest serving cost |
| NOW Quercetin With BromelainBest combination | Quercetin 800 mg + bromelain 165 mg | 2 capsules; 30 servings | $21.99 regular; $0.73/serving | Bromelain activity disclosed as 2,400 GDU/g |
Cost per serving uses the full labeled serving. It is not a comparison of absorbed quercetin or clinical effect.
1. Thorne Quercetin Phytosome
Best overallThorne takes the overall position because the label identifies a quercetin phospholipid complex from sunflower, supplies it in one capsule, and states that the finished package is third-party tested and certified. The bottle contains 60 servings at 250 mg per serving.
- Price
- $46
- Serving
- 1 capsule
- Amount
- 250 mg
- Servings
- 60
Phospholipid delivery is designed to address quercetin's low oral bioavailability, but the format does not prove better symptom control or health outcomes for this finished product. At about $0.77 per serving, it is the most expensive pick in this comparison.
2. Life Extension Quercetin 500 mg
Best valueLife Extension is the direct, high-count value pick. One vegetarian capsule provides 500 mg of quercetin, and the bottle contains 100 servings. The one-time price of $29.24 works out to about $0.29 per serving.
- Price
- $29.24
- Serving
- 1 capsule
- Amount
- 500 mg
- Servings
- 100
The tradeoff is formulation: this is plain quercetin rather than a phospholipid complex. A higher label amount does not prove higher absorbed exposure. It is the best fit when the priority is a simple formula and low labeled serving cost.
3. NOW Quercetin With Bromelain
Best combinationNOW is the only pick here with a second active ingredient. A two-capsule serving provides 800 mg of quercetin and 165 mg of bromelain, with bromelain activity listed as 2,400 GDU per gram. The 60-capsule bottle contains 30 servings.
- Regular price
- $21.99
- Serving
- 2 capsules
- Quercetin
- 800 mg
- Bromelain
- 165 mg
The company warns against use with pineapple allergy and advises clinical review for prescription drugs, pregnancy or nursing, and medical conditions including kidney dysfunction. Direct human evidence does not show that bromelain improves quercetin absorption, so this is a combination preference rather than the overall winner.
Which quercetin product fits your priority?
- For a named phospholipid format and testing statement: Thorne Quercetin Phytosome, 250 mg in one capsule.
- For the lowest regular cost per labeled serving: Life Extension Quercetin 500 mg, about $0.29 for one capsule.
- For quercetin plus bromelain: NOW, 800 mg quercetin and 165 mg bromelain in two capsules.
- For pineapple allergy: exclude the bromelain formula.
- For a lot-specific laboratory report: request a report matching the bottle lot before purchase; a general testing statement is not a lot result.
What the evidence means for a buying decision
NIH describes quercetin as having low and formulation-dependent oral bioavailability. Short human trials have used amounts up to 1,000 mg/day for up to 12 weeks without serious adverse events, but that does not establish long-term safety or a general preventive benefit.
Quercetin may interact with drug-metabolizing enzymes and specific medicines. Pregnancy, breastfeeding, kidney disease, prescription medicines, and planned surgery are reasons to review the exact product and serving with a clinician or pharmacist. Our guide to quercetin with bromelain explains why the combination should not be treated as proven synergy.