PlainVitamins

Quercetin Plus

by Prescribed Choice · capsule · 60 vegetarian capsules

  • Off the market since November 2023 (NIH)
  • UPC 7 10013 80705 2
  • DSLD label 27984
  • Serving 2 capsules
  • 30 servings

Quercetin Plus by Prescribed Choice lists 2 ingredients, 2 with an amount per serving of 2 capsules, such as 200 mg of vitamin C and 1 g of quercetin. Its current label entered the NIH Dietary Supplement Label Database on December 24, 2013.

What is in Quercetin Plus?

Each row as the label prints it, per serving of 2 capsules. 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 Plus: Supplement Facts rows against the market (DSLD label 27984, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid200 mg333%Vitamin C in Quercetin Plus against 18,583 products200 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg200 mg

Higher than 63% of 18,583 products listing vitamin C (median 100 mg).

Quercetin1 gQuercetin in Quercetin Plus against 1,548 products1,000 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.1,000 mg

Higher than 96% of 1,548 products listing quercetin (median 100 mg).

Source: NIH ODS Dietary Supplement Label Database, label 27984 (entered December 24, 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?

The rows in the top or bottom tenth of the products that list the same ingredient, and any above the adult upper limit at the most servings a day the directions give:

  • Its 1,000 mg of quercetin is higher than 96% of the 1,548 quercetin products that print an amount; 15 list more.

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?

6 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: As a dietary supplement, take two (2) capsules daily with a meal, or as directed by a healthcare professional.
Warnings
*NOTICE TO CALIFORNIA RESIDENTS* WARNING: This product contains a chemical known to the State of California to cause birth defects or other reproductive harm.
KEEP OUT OF REACH OF CHILDREN.
Storage
STORE IN COOL, DRY PLACE.

Source: label statements in DSLD label 27984.

What else is on the label?

Other ingredients: Microcrystalline Cellulose, Rice Flour, Ascorbyl Palmitate, Silica.

How many labels does Quercetin Plus have?

One label is on file, entered on December 24, 2013.

  1. Label 27984 (current) Entered December 24, 2013 · off the market November 9, 2023 · 60 vegetarian capsules · UPC 7 10013 80705 2

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

Who makes it?

The label names Olympian Labs, Inc. (distributor), Phoenix, AZ. All Prescribed Choice products.

Where next?