Magnesium Oxide®

Minerals

Brand: NOW

PowderMineralOff Market

Product label for Magnesium Oxide — Click to view full label

Net Contents

8 oz.

Serving Size

0.25 tsp

Servings Per Container

324

Supplement Form

Powder

Bar Code (UPC/SKU)

7 33739 01310 1

Product Version

CODE 1310 V1

Label Analysis

Objective insights generated automatically from the official DSLD label — a quick, factual read of how this product is formulated and disclosed.

1Active Ingredients

Single-ingredient formula listed in Supplement Facts.

100%Amount Transparency

Every active ingredient discloses a specific amount per serving.

1% Daily Value Coverage

1 ingredients report a %DV; 1 meet or exceed 100% DV.

1Dietary Attributes

Label states: Gluten-Free.

This analysis is generated algorithmically from label data for educational reference only. It is not a product endorsement, ranking, or medical advice.

Allergen Guide

Contains

Milk
Egg
Wheat
Soy
Gluten

Allergen flags are parsed automatically from the official label's claims and statements. Always verify against the physical product label before use, especially if you have a severe allergy.

Supplement Facts

Serving Size: 0.25 tsp · 1 per day

Ingredient	Amount Per Serving	% Daily Value
Magnesium(Magnesium Oxide)	400 mg	100%

Not Present

Other Ingredients

None

Target Groups

Adult (18 - 50 Years)Gluten FreeDairy Free

Label Claims

All OtherStructure/Function

Directions & Suggested Use

Suggested/Recommended/Usage/Directions

SUGGESTED USAGE: As a dietary supplement, take 1/4 level teaspoon daily, preferably with meals or in juices.

Formulation

Formulation re: Does NOT Contain

Contains no yeast, milk, wheat, gluten, egg, corn or soy.

FDA Statements

FDA Disclaimer Statement

*These statements have not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease.

FDA Statement of Identity

A Dietary Supplement

Other Label Statements

General Statements: All Other Content

Magnesium Oxide is derived from ancient oceanic deposits and is a rich source of elemental magnesium. Magnesium is an essential mineral that plays a key role in the activation of amino acids for protein biosynthesis and is highly concentrated in intracellular fluid and bone.*

General: Product/Version Code

CODE 1310 V1

General Statements: All Other Content

NERVOUS SYSTEM SUPPORT 100% Pure Powder • Supports Energy Production • Critical for Enzyme Function*

Seals/Symbols

GMP QUALITY ASSURED

Manufacturer & Distributor

Manufacturer

NOW FOODS

BLOOMINGDALE, IL, 60108

Other

Market Reference

$4.99 – $70.99· 40 listings

NOW Magnesium Oxide Powder 8 oz
Walmart - Highland Health Foods4.6(463)
$13.79
NOW Foods Magnesium Oxide 8 oz.
NOW4.6(463)
$16.99
(2 pack) NOW Supplements, Magnesium Oxide, Enzyme Function*, Nervous System Support*, 8-Ounce, Size: 6.20
Walmart - Fruitful Yield4.6(463)
$25.40
NOW Magnesium Oxide Powder
Aviva Natural Health Solutions5.0(7)
$13.68
NOW Magnesium 500 mg 120 Veg Capsules
Target5.0(30)
$26.99
NOW Foods Magnesium 400mg 180 Veg Capsules
PureFormulas.com4.8(10000)
$14.27
NOW Foods Liquid Magnesium 8 fl.. oz.
iHerb4.7(461)
$17.14
NOW Calcium & Magnesium 250 Tablets
Muscle & Strength4.8(9000)
$6.99

Where to Buy Locally

Enter your city or ZIP code to find supplement & health stores in your area that may carry this product.

Showing representative supplement & health retailers — search above for stores in your area.

The Vitamin Shoppe
4.5 (160)
Vitamin & supplements store
551 Southpark Blvd, Colonial Heights, VA 23834
Directions (804) 526-5974
GNC
4.1 (48)
Vitamin & supplements store
12718 Jefferson Davis Hgwy, Chester, VA 23831
Directions (804) 751-9204
GNC
4.0 (21)
Vitamin & supplements store
248 Southpark Cir Sp F 80, Colonial Heights, VA 23834
Directions (804) 520-7131

Research & Studies

The magnesium miracle
C Dean - 2017 - books.google.com
… on magnesium that has failed to be included in the medical … However, magnesium oxide is their treatment of choiceeven … of magnesium; we need to implement what we know, now. …
2017175 citations
A randomized controlled study of effects of dietary magnesium oxide supplementation on bone mineral content in healthy girls
TO Carpenter, MC DeLucia, JH Zhang… - The Journal of …, 2006 - academic.oup.com
… Mg was supplemented twice daily in a capsule containing powdered magnesium oxide (300 mg of elemental Mg per day). Identically appearing encapsulated methylcellulose powder …
2006160 citations
The miracle of magnesium
C Dean - 2007 - books.google.com
… my dosage from 200 mg a day in a calcium/magnesium combination to 500 mg of magnesium oxide … she would end up in ten or twenty years if she didn't take care of her health now? …
200721 citations
Magnesium Glycinate vs Oxide vs Threonate (2026)
Q Answer, WFSY Take - yourhealthier.com
… Magnesium glycinate, magnesium oxide, and magnesium threonate are three of the most … Magnesium threonate is better for targeted brain health, and magnesium oxide is only useful …
Effects of magnesium citrate, magnesium oxide and magnesium sulfate supplementation on arterial stiffness in healthy overweight individuals: a study protocol for a …
JC Schutten, PJ Joris, RP Mensink, RM Danel… - Trials, 2019 - Springer
… whether magnesium oxide and magnesium sulfate are noninferior to the effect of magnesium … citrate on arterial stiffness that we found in our previous study [9], now with a slightly higher …
201924 citations
Effect of magnesium oxide supplementation on nocturnal leg cramps: a randomized clinical trial
N Roguin Maor, M Alperin, E Shturman… - JAMA internal …, 2017 - jamanetwork.com
… 1% of total body magnesium) may not accurately mirror magnesium status. A … supplemental oral magnesium oxide, vs magnesium citrate, on intracellular magnesium levels in healthy …
201759 citations

Related News

Magnesium Forms Explained: Oxide, Citrate, and Glycinate
The magnesium form on a label affects how much elemental magnesium you get. Here is how the common forms compare.
VitaSuppTrack Editorial· Jun 24, 2026

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Data sourced from the U.S. National Institutes of Health, Office of Dietary Supplements Dietary Supplement Label Database (DSLD) · Label entered 2012-10-25. DSLD Label ID: 14596. This information is provided for educational reference only and is not medical advice. Always follow the product label and consult a doctor or pharmacist before use.