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Doctor's Best vs NOW Foods Quercetin (2026)
Disclosure: We earn commissions on purchases made through our links. This never influences our scores. Editorial policy
The Verdict
This is a dead heat on our rubric, 87 to 87 on our 0-100 execution score with matching pillars. In our view Doctor's Best is the better buy on cost: about $0.15 per day at a 500mg quercetin serving with 250mg of bromelain, against NOW at about $0.17 per capsule that rises to roughly $0.34 at the full 800mg two-capsule serving. Doctor's Best is also third-party tested per our data, while NOW is tested in-house from an NPA A-rated facility with no independent third-party certification on this specific product.
Neither carries NSF or USP certification. NOW's advantage is dosing flexibility: one capsule for 400mg maintenance or two for a full 800mg, which is genuinely useful if you want to titrate. The limitation both share is that standard quercetin dihydrate has limited bioavailability, which no amount of milligrams fixes. In our view, take Doctor's Best for cost and third-party testing, and NOW if you want the option of a lower daily dose.
Quercetin Bromelain 500 mg
Doctor's Best
Quercetin with Bromelain 800 mg
NOW Foods
Head-to-Head Comparison
| Category | Quercetin Bromelain 500 mg Doctor's Best | Quercetin with Bromelain 800 mg NOW Foods |
|---|---|---|
| Brand Score | 87/100Winner | 87/100 |
| Dosing & Form | 25/25Winner | 25/25 |
| Purity | 19/25Winner | 19/25 |
| Value | 23/25Winner | 23/25 |
| Transparency | 20/25Winner | 20/25 |
| Cost/Day | $0.15Winner | $0.17 |
| Dose/Serving | 500mg | 800mg |
| Form | Quercetin dihydrate + bromelain capsule | Quercetin dihydrate + bromelain capsule |
| Third-Party Tested | ✓ Yes | No |
| Proprietary Blend | No | No |
Why This Comparison Matters
These two products tie exactly on our rubric, and their pillar breakdowns are identical: 25 on dosing and form, 19 on purity verification, 23 on value, 20 on transparency. Both pair quercetin dihydrate with bromelain, which our notes credit as a sensible formulation choice because bromelain may modestly improve quercetin absorption and brings its own evidence.
The labels are structured differently, though, and it changes the arithmetic. Doctor's Best is 500mg quercetin plus 250mg bromelain per serving across 180 servings for $26.77, about $0.15 per day. NOW Foods is 400mg quercetin plus 100mg bromelain per capsule, 120 capsules for $20.49; that is about $0.17 for one capsule and roughly $0.34 at the full two-capsule 800mg serving.
We scored both on the same four factors. Here is where the tie comes from and what actually separates them.
Detailed Score Breakdown
Quercetin Bromelain 500 mg
Doctor's Best
500mg quercetin with 250mg bromelain per serving - bromelain may modestly improve quercetin absorption and provides its own anti-inflammatory properties
Third-party tested, GMP certified, no major certifications like NSF or USP but reliable manufacturing history
$0.15/day - outstanding value; one of the cheapest ways to get a clinically dosed quercetin with an absorption co-factor
Clear dosing of both quercetin and bromelain, form specified (quercetin dihydrate), no proprietary blends
The bromelain addition is a smart formulation choice - it may improve quercetin absorption and has its own anti-inflammatory evidence. Exceptional value per serving, though standard quercetin bioavailability remains a limitation.
Quercetin with Bromelain 800 mg
NOW Foods
400mg quercetin + 100mg bromelain per capsule (2-capsule serving = 800mg quercetin + 200mg bromelain) - well above clinical threshold
GMP certified (NPA A-rated), tested in-house; no independent third-party certification like NSF or USP on this specific product
$0.17/day at 1-capsule dose (400mg) or $0.34/day at full 2-capsule serving - strong value either way
Clear per-capsule and per-serving disclosure, forms specified, no proprietary blends
Flexible dosing - one capsule (400mg quercetin) may suffice for maintenance, two capsules (800mg) for full clinical dosing. Good value with bromelain co-factor included. Standard quercetin form limits bioavailability.
How We Compared These Products
Every product in our database is scored on four equally-weighted pillars: dosing accuracy and form quality, purity verification (third-party testing), cost per clinically effective dose (not cost per pill), and label transparency. Each pillar is worth 25 points for a total of 100.
Cost per effective dose is calculated using the clinically studied dose from published research, not the manufacturer's suggested serving. If a product requires multiple servings to reach the dose used in clinical trials, that cost is reflected in the value score.
For a full explanation of our scoring methodology, see our methodology page. Prices were last checked on the dates listed for each product and may have changed.
Frequently Asked Questions
Which quercetin product is actually cheaper?
Doctor's Best, on our data. It runs about $0.15 per day for a 500mg quercetin plus 250mg bromelain serving. NOW Foods is about $0.17 for one capsule (400mg quercetin), but reaching its full labeled 800mg serving takes two capsules and roughly doubles that to about $0.34 per day.
Why is bromelain included with quercetin?
Per our product notes, bromelain may modestly improve quercetin absorption and carries its own anti-inflammatory evidence. Doctor's Best pairs 500mg quercetin with 250mg bromelain; NOW pairs 400mg quercetin with 100mg bromelain per capsule. In our view it is a reasonable formulation choice rather than a marketing addition.
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FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. Dietary supplements are not intended to diagnose, treat, cure, or prevent any disease. Always consult with a qualified healthcare professional before starting any supplement regimen.