PlainVitamins

Magnesium Oxide 540 mg

by Dr. Clark Research Association Dr. Clark Zentrum · capsule · 100 capsules

  • On the market (NIH)
  • UPC 7 640116 923140
  • DSLD label 255122
  • Serving 2 capsules
  • 50 servings

Magnesium Oxide 540 mg by Dr. Clark Research Association Dr. Clark Zentrum lists one ingredient: 600 mg of magnesium per serving of 2 capsules. Its current label entered the NIH Dietary Supplement Label Database on September 24, 2021.

What is in Magnesium Oxide 540 mg?

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).

Magnesium Oxide 540 mg: Supplement Facts rows against the market (DSLD label 255122, January 2026 release)
IngredientAmount% DVAmong products listing it
Magnesiumas Magnesium Oxide600 mg150%Magnesium in Magnesium Oxide 540 mg against 14,003 products600 mg per serving; the middle half of products list 30 mg to 200 mg, the median 86 mg.UL 350 mgDV 420 mg600 mg

Higher than 99% of 14,003 products listing magnesium (median 86 mg). 1.7 times the adult UL a day.

Source: NIH ODS Dietary Supplement Label Database, label 255122 (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 1 serving a day, the most its directions give, the label lists 600 mg of magnesium, 1.7 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?

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
Adults and children 12 or more years of age: 2 capsules daily with a meal or as directed.
Best before: see expiration date.
Warnings
Dietary supplements/food supplements should not be used as a substitute for a varied diet. Do not exceed the stated recommended daily dose.
Storage
Store out of reach of young children. Store in a dry, cool place.

Source: label statements in DSLD label 255122.

What else is on the label?

Other ingredients: Magnesium Oxide, Gelatin.

How many labels does Magnesium Oxide 540 mg have?

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

  1. Label 255122 (current) Entered September 24, 2021 · on the market · 100 capsules · UPC 7 640116 923140

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

Who makes it?

The label names Dr. Clark Zentrum Limited (distributor), San Gwann, Malta. All Dr. Clark Research Association Dr. Clark Zentrum products.

Where next?