BioStacks
Nature's Bounty

Quercetin 500mg

2 Capsules · 30 servings · $0.73/serving

iHerbAmazon

Best for

Immune

Ingredients (8)

Vitamin C

100%

Dose

500 mg

Target

50–250 mg

Form

Standard

Quercetin

100%

Dose

500 mg

Target

500–1000 mg

Form

—

Acerola Extract

50%

Dose

50 mg

Target

100–500 mg

Form

—

Bromelain

20%

Dose

100 gdu

Target

500–2400 gdu

Form

—

Citrus Bioflavonoid Complex

20%

Dose

50 mg

Target

250–1000 mg

Form

—

Other Ingredients (5)

MaltodextrinBinder

Spikes blood sugar faster than table sugar (glycemic index 85–105). Research links it to gut bacteria changes that may promote intestinal inflammation (Nickerson et al. 2015). Used as a cheap filler — adds nothing beneficial.

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

Magnesium StearateLubricant

A salt of stearic acid used as a lubricant in tablet and capsule production

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

Stearic AcidLubricant

Saturated fatty acid used as tablet lubricant

How to Take It

Take it anytime

What's in this absorbs poorly without a fat-containing meal — take it with one.

With a meal containing fat

On the label

For Adults, take two (2) capsules daily, preferably with a meal.

General guidance based on the ingredients, not a substitute for the label or your doctor.

Price Check

$21.86

$20$50

Cheaper than 66% of 71 quercetin supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.

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