Magnesium Oxide 420 mg
by Nationwide Pharmaceutical · tablet or pill · 100 tablets
- On the market (NIH)
- UPC 3 69375 00810 4
- DSLD label 327373
- Serving 1 tablet
- 100 servings
Magnesium Oxide 420 mg by Nationwide Pharmaceutical lists 2 ingredients, 2 with an amount per serving of 1 tablet, such as 252 mg of magnesium. Its current label entered the NIH Dietary Supplement Label Database on February 23, 2025.
What is in Magnesium Oxide 420 mg?
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).
| Ingredient | Amount | % DV | Among products listing it |
|---|---|---|---|
| Magnesium | 252 mg | 63% | Higher than 86% of 14,003 products listing magnesium (median 86 mg). |
| Magnesium Oxide | 420 mg |
Source: NIH ODS Dietary Supplement Label Database, label 327373 (entered February 23, 2025), version 9.4.0. See the label on DSLD or its label image (PDF). 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?
6 products list the very same ingredients; the nearest amounts come first.
- Magnesium 250GNC · off the market same ingredients
- Chelated Magnesium 250 mgVitaCeutical Labs same ingredients
- Natural Magnesium 250 mgLongs Wellness · off the market same ingredients
- Natural Magnesium 250 mgSunmark same ingredients
- Magnesium 250 mg SupplementNature Made · off the market same ingredients
- Mag-Tea GDouglas Laboratories 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: Adults: Take one tablet daily with a meal as a dietary supplement or as directed by a doctor.
- Warnings
- Warnings: Not recommended for use in amounts over the recommended daily intake of 420mg per day (1 tablet). May have a laxative effect.
- Ask a doctor or pharmacist before use if you have a known allergy to this product. Stop use and contact a doctor if allergic reaction occurs.
- Consult a doctor before using this product if you have kidney disease or are pregnant or nursing a baby.
- Keep out of reach of children.
- Do not use if imprinted safety seal under cap is broken or missing
- Storage
- Other information: Store at controlled room temperature 15-30 degrees C (58-86 degrees F) Store in original container with lid tightly closed in a dry place Use by expiration date on package
Source: label statements in DSLD label 327373.
What else is on the label?
Other ingredients: Microcrystalline Cellulose, Croscarmellose Sodium, Silicon Dioxide, Stearic Acid, Magnesium Stearate, Titanium Dioxide, Hypromellose.
How many labels does Magnesium Oxide 420 mg have?
One label is on file, entered on February 23, 2025.
- Label 327373 (current) Entered February 23, 2025 · on the market · 100 tablets · UPC 3 69375 00810 4
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Nationwide Pharmaceutical LLC (distributor), San Antonio, TX. All Nationwide Pharmaceutical products.