PlainVitamins

QBC Plex

by Solaray · capsule · 120 vegcaps

  • Off the market since June 2022 (NIH)
  • UPC 0 76280 04467 6
  • DSLD label 255191
  • Serving 2 vegcaps
  • 60 servings

QBC Plex by Solaray lists 3 ingredients, 3 with an amount per serving of 2 vegcaps, such as 1,250 mg of vitamin C, 500 mg of quercetin dihydrate and 50 mg of bromelain. Its current label entered the NIH Dietary Supplement Label Database on September 24, 2021.

What is in QBC Plex?

Each row as the label prints it, per serving of 2 vegcaps. 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).

QBC Plex: Supplement Facts rows against the market (DSLD label 255191, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid1,250 mg2,083%Vitamin C in QBC Plex against 18,583 products1,250 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg1,250 mg

Higher than 98% of 18,583 products listing vitamin C (median 100 mg). Per day at the most servings: 2,500 mg. 1.3 times the adult UL a day.

Quercetin Dihydrate500 mgQuercetin in QBC Plex against 1,548 products500 mg per serving; the middle half of products list 26.5 mg to 250 mg, the median 100 mg.500 mg

Higher than 84% of 1,548 products listing quercetin (median 100 mg). Per day at the most servings: 1,000 mg.

BromelainBromelain Note: 1,800 MCU/g50 mgBromelain in QBC Plex against 1,337 products50 mg per serving; the middle half of products list 25 mg to 200 mg, the median 50 mg.50 mg

50% of 1,337 products listing bromelain give more (median 50 mg). Per day at the most servings: 100 mg.

Source: NIH ODS Dietary Supplement Label Database, label 255191 (entered September 24, 2021), 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:

  • At 2 servings a day, the most its directions give, the label lists 2,500 mg of vitamin C, 1.3 times the adult Tolerable Upper Intake Level.

The NIH database records 1 to 2 servings 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?

5 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
Directions: Use only as directed. Take two VegCaps once or twice daily with water between meals.
Warnings
Warning: Do not use if safety seal is broken or missing.
Keep out of reach of children.
Keep your licensed health care practitioner informed when using this product.
Storage
Store in a cool, dry place.

Source: label statements in DSLD label 255191.

What else is on the label?

Other ingredients: Vegetable Cellulose Capsule, Magnesium Stearate, Maltodextrin.

How many labels does QBC Plex have?

One label is on file, entered on September 24, 2021.

  1. Label 255191 (current) Entered September 24, 2021 · off the market June 22, 2022 · 120 vegcaps · UPC 0 76280 04467 6

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

Who makes it?

The label names Nutraceutical Corp. (manufacturer). All Solaray products.

Where next?