Magnesium Oxide 400
by Foster Regal · tablet or pill · 120 tablets
- On the market (NIH)
- DSLD label 260266
- Serving 2 tablets
- 60 servings
Magnesium Oxide 400 by Foster Regal lists one ingredient: 482.6 mg of elemental magnesium per serving of 2 tablets. Its current label entered the NIH Dietary Supplement Label Database on April 11, 2022.
What is in Magnesium Oxide 400?
Each row as the label prints it, per serving of 2 tablets. 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 |
|---|---|---|---|
| elemental Magnesiumas Magnesium Oxide | 482.6 mg | 121% | Higher than 96% of 14,003 products listing magnesium (median 86 mg). 1.4 times the adult UL a day. |
Source: NIH ODS Dietary Supplement Label Database, label 260266 (entered April 11, 2022), 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?
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 482.6 mg of magnesium, 1.4 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.
- MagOx 400HCP Health Care Products · off the market same ingredients
- Magnesium Oxide 400Windmill Comparables · off the market same ingredients
- Magnesium Oxide 400Windmill Natural Vitamins · off the market same ingredients
- Magnesium Oxide 400Wonder Labs same ingredients
- Magnesium Oxide 400Windmill same ingredients
- Magnesium Oxide 400 mgFoods Plus · 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, take 2 tablets daily with food or as directed by a physician.
- Warnings
- Tamper evident: Do not use this product if imprinted foil seal under cap is broken or missing.
- Keep out of reach of children.
- Caution: If you are pregnant, nursing, have kidney disease or are taking any prescription medication, consult your physician before taking this product.
- Allergens and what it does not contain
- Gluten free
- Storage
- Keep tightly closed. Store at room temperature: 59 degrees - 86 degrees F (15 degrees - 30 degrees C).
Source: label statements in DSLD label 260266.
What else is on the label?
Other ingredients: Vegetable Cellulose, Vegetable Stearic Acid, Vegetable Magnesium Stearate, Silica.
How many labels does Magnesium Oxide 400 have?
One label is on file, entered on April 11, 2022.
- Label 260266 (current) Entered April 11, 2022 · on the market · 120 tablets
Source: DSLD label entry and market events, version 9.4.0 (labels entered through September 25, 2025).
Who makes it?
The label names Foster Regal Laboratories (distributor), White House, TN. All Foster Regal products.