PlainVitamins

Quercetin Complex

by VSN Vital Strength Nutrition · capsule · 100 vegetarian capsules

  • Off the market since November 2019 (NIH)
  • UPC 7 19985 18140 5
  • DSLD label 20678
  • Serving 1 to 6 capsules; amounts per 1 capsule
  • 100 servings

Quercetin Complex by VSN Vital Strength Nutrition lists 5 ingredients, 5 with an amount per serving of 1 capsule, such as 100 mg of vitamin C, 15 mg of magnesium, 25 mg of bromelain and 50 mg of lemon bioflavonoid complex. Its current label entered the NIH Dietary Supplement Label Database on April 25, 2013.

What is in Quercetin Complex?

Each row as the label prints it, per serving of 1 capsule. The capsule beside an amount places it among every product in the NIH database that lists the same ingredient: the bar is the middle half of their amounts, the line in it the median, the whiskers the 10th and 90th percentiles; the green tick is the FDA Daily Value and the red dashed tick the adult upper limit (IOM).

Quercetin Complex: Supplement Facts rows against the market (DSLD label 20678, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid100 mg170%Vitamin C in Quercetin Complex against 18,583 products100 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg100 mg

50% of 18,583 products listing vitamin C give more (median 100 mg).

Magnesiumas Magnesium CarbonateMagnesium (Form: from Magnesium Carbonate)15 mg4%Magnesium in Quercetin Complex against 14,003 products15 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg15 mg

87% of 14,003 products listing magnesium give more (median 86 mg).

Bromelainas PineappleBromelain (Form: from Pineapple)25 mgBromelain in Quercetin Complex against 1,337 products25 mg per serving; the middle half of products list 25 mg to 200 mg, the median 50 mg.25 mg

66% of 1,337 products listing bromelain give more (median 50 mg).

Lemon Bioflavonoid Complex50 mgFlavonoid in Quercetin Complex against 2,343 products50 mg per serving; the middle half of products list 25 mg to 100 mg, the median 50 mg.50 mg

46% of 2,343 products listing flavonoid give more (median 50 mg).

Quercetin250 mgQuercetin in Quercetin Complex against 1,548 products250 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.250 mg

Higher than 71% of 1,548 products listing quercetin (median 100 mg).

Source: NIH ODS Dietary Supplement Label Database, label 20678 (entered April 25, 2013), version 9.4.0. See the label on DSLD. Amounts are what the maker printed; DSLD does not test products. Daily Values: the FDA's Daily Value page.

Is that a lot?

Every amount on this label with a position sits within the middle 80% of the products that list the same ingredient.

The NIH database records one serving a day from the label's directions; its % Daily Values are for adults and children 4 or more years of age. The directions as printed are further down this page.

The Tolerable Upper Intake Level is the most of a nutrient per day, from food, water and supplements together, that is likely to pose no risk for almost all adults (Institute of Medicine, 2011). It does not apply under medical supervision. This page compares labels; it is not medical advice.

Sources: amounts from the DSLD label; Daily Values from 21 CFR 101.9(c)(8)(iv); adult upper limits from the Institute of Medicine's DRI summary tables (2011). How positions are computed.

Which products have the closest formulas?

4 products list the very same ingredients; the nearest amounts come first.

Source: ingredient lists of every product's current label in DSLD (version 9.4.0); similarity weights each shared ingredient by how rare it is.

What does the label say about taking it?

Quoted from the label as DSLD transcribed it: the maker's words, including any claim about what the product does, which the FDA has not evaluated and PlainVitamins does not endorse.

Directions
SUGGESTED USE: Take 1-6 capsules daily between meals.
Warnings
KEEP OUT OF REACH OF CHILDREN.
Allergens and what it does not contain
CONTAINS NO artificial colors, flavors or preservatives; no wheat, gluten, milk, eggs, peanuts, tree nuts, soy, crustacean shellfish or fish.

Source: label statements in DSLD label 20678.

What else is on the label?

Other ingredients: Magnesium Stearate, Vegetarian Capsule, Cellulose, Silica.

Seals and symbols as the label prints them (the maker's; a certifier's own list confirms a seal): DOUBLE VERIFIED GLUTEN FREE(TM).

How many labels does Quercetin Complex have?

One label is on file, entered on April 25, 2013.

  1. Label 20678 (current) Entered April 25, 2013 · off the market November 20, 2019 · 100 vegetarian capsules · UPC 7 19985 18140 5

Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).

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