Z-Plex

by Bronson · tablet or pill · 250 tablets

  • On the market (NIH)
  • UPC 7 16563 07202 5
  • DSLD label 257993
  • Serving 1 tablet
  • 250 servings

Z-Plex by Bronson lists 13 ingredients, 13 with an amount per serving of 1 tablet, such as 600 mg of vitamin C, 30 mg of vitamin E, 20 mg of thiamine and 15 mg of riboflavin. Its current label entered the NIH Dietary Supplement Label Database on January 22, 2022.

What is in Z-Plex?

Each row as the label prints it, per serving of 1 tablet. 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).

Z-Plex: Supplement Facts rows against the market (DSLD label 257993, January 2026 release)
IngredientAmount% DVAmong products listing it
Vitamin Cas Ascorbic Acid600 mg667%Vitamin C in Z-Plex against 18,583 products600 mg per serving; the middle half of products list 60 mg to 270 mg, the median 100 mg.DV 90 mgUL 2,000 mg600 mg

Higher than 89% of 18,583 products listing vitamin C (median 100 mg).

Vitamin Eas DL-Alpha-Tocopheryl SuccinateVitamin E (Form: as DL-Alpha Tocopheryl succinate)30 mg200%
Thiamineas Thiamine Mononitrate, Vitamin B1Thiamine (Form: as Thiamine Mononitrate)20 mg1,667%Thiamin in Z-Plex against 9,830 products20 mg per serving; the middle half of products list 1.5 mg to 25 mg, the median 5 mg.DV 1.2 mg20 mg

Higher than 69% of 9,830 products listing thiamin (median 5 mg).

Riboflavinas Vitamin B215 mg1,154%Riboflavin in Z-Plex against 9,824 products15 mg per serving; the middle half of products list 1.7 mg to 25 mg, the median 4 mg.DV 1.3 mg15 mg

Higher than 69% of 9,824 products listing riboflavin (median 4 mg).

Niacinas Niacinamide, Vitamin B3Niacin (Form: as Niacinamide)100 mg NE625%Niacin in Z-Plex against 12,413 products100 mg per serving; the middle half of products list 13.2 mg to 48 mg, the median 20 mg.DV 16 mgUL 35 mg100 mg

Higher than 88% of 12,413 products listing niacin (median 20 mg). 2.9 times the adult UL a day.

Vitamin B6as Pyridoxine Hydrochloride25 mg1,471%Vitamin B6 in Z-Plex against 15,277 products25 mg per serving; the middle half of products list 2 mg to 20 mg, the median 6 mg.DV 1.7 mgUL 100 mg25 mg

Higher than 76% of 15,277 products listing vitamin B6 (median 6 mg).

Folate666 mcg DFE167%
Folic Acid400 mcg
Vitamin B12as Cyanocobalamin25 mcg1,042%Vitamin B12 in Z-Plex against 14,425 products25 mcg per serving; the middle half of products list 6 mcg to 200 mcg, the median 36 mcg.DV 2.4 mcg25 mcg

54% of 14,425 products listing vitamin B12 give more (median 36 mcg).

Biotin100 mcg333%Biotin in Z-Plex against 9,447 products100 mcg per serving; the middle half of products list 50 mcg to 300 mcg, the median 200 mcg.DV 30 mcg100 mcg

61% of 9,447 products listing biotin give more (median 200 mcg).

Pantothenic Acidas Calcium D-Pantothenate30 mg600%Pantothenic Acid (Vitamin B5) in Z-Plex against 10,060 products30 mg per serving; the middle half of products list 6 mg to 50 mg, the median 12 mg.DV 5 mg30 mg

Higher than 66% of 10,060 products listing pantothenic acid (vitamin B5) (median 12 mg).

Magnesiumas Magnesium Oxide75 mg18%Magnesium in Z-Plex against 14,003 products75 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg75 mg

52% of 14,003 products listing magnesium give more (median 86 mg).

Zincas Zinc Gluconate, Zinc SulfateZinc (Form: as zinc gluconate, and as 50% zinc sulfate)30 mg273%Zinc in Z-Plex against 13,186 products30 mg per serving; the middle half of products list 5 mg to 15 mg, the median 11 mg.DV 11 mgUL 40 mg30 mg

Higher than 90% of 13,186 products listing zinc (median 11 mg).

Source: NIH ODS Dietary Supplement Label Database, label 257993 (entered January 22, 2022), 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 1 serving a day, the most its directions give, the label lists 100 mg of niacin, 2.9 times the adult Tolerable Upper Intake Level.

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?

1 product lists the very same ingredients; the nearest amounts come first.

  • Z-PlexBronson Laboratories · off the market same ingredients

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: As a dietary supplement for adults, take 1 tablet daily or as recommended by a healthcare professional.
Warnings
Contains Soy.
Warning: Consult a healthcare professional before taking this product if you are pregnant or nursing.
Keep out of reach of children.
Storage
Store at room temperature.

Source: label statements in DSLD label 257993.

What else is on the label?

Other ingredients: Microcrystalline Cellulose, Croscarmellose Sodium, Stearic Acid, Magnesium Stearate, Silicon Dioxide, Hydroxypropyl Methylcellulose, Polyethylene Glycol, Riboflavin, Titanium Dioxide.

How many labels does Z-Plex have?

2 labels are on file under this name since November 19, 2021: other sizes, label designs and reformulations. The current one leads this page.

  1. Label 257993 (current) Entered January 22, 2022 · on the market · 250 tablets · UPC 7 16563 07202 5
  2. Label 257989 Entered November 19, 2021 · on the market · 100 tablets · UPC 7 16563 07201 8

DSLD also links this label to: Z-Plex (package size difference, same product), Z-Plex (image difference, same product), Z-Plex (package size difference, same product), Zinc 15 mg (image difference, same product).

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

Who makes it?

The label names Bronson Laboratories (manufacturer), Lindon, UT. All Bronson products.

Where next?