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Magnesium Oxide 400 mg

product on market Tablet or Pill Major Pharmaceuticals Safety: 100/100
100/100

This product looks safe

  • No ingredients exceed tolerable upper intake levels
  • 100% of ingredients have research evidence
A Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · grounded in 1 source · methodology

Elemental magnesium is supported by strong evidence for its role in supporting nerve function and muscle relaxation. Magnesium oxide serves as a common source for supplementing this essential mineral. Research indicates it is generally well-tolerated when taken within recommended dosages.

AI-generated summary based on research evidence. Not medical advice.

Label

Product Label

Label for Magnesium Oxide 400 mg
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Tablet(s)
Serving Size
Mineral
Product Type
100%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

240 mg (57% DV)
Within RDA (0.6× RDA) 316 studies (A:8, B:159)

Other Ingredients

Microcrystalline Cellulose Stearic Acid pregelatinized Corn Starch Croscarmellose Sodium Sodium Starch Glycolate Magnesium Stearate
Claims

Label Claims — Verification

Unverified All Other
Info

Product Information

Directions for Use

Directions: Adults: Take 1 tablet daily with a meal as a dietary supplement or as directed by a doctor.

Warnings & Precautions

Warnings: Not recommended for use in amounts over the recommended daily intake at 400 mg per day (1 tablet).

Ask a doctor or pharmacist before use if you have a known allergy to this product. Stop use and contact a doctor if an allergic reaction occurs.

Consult a doctor before using this product if you have kidney disease, or are pregnant or nursing a baby.

May have a laxative effect.

Drug Interaction Precaution: This product may interact with certain prescription drugs. If you are presently taking a prescription drug, do not take this product without consulting your doctor or other health professional.

Keep out of reach of children.

Tamper Evident: Do not use if sealed blister units are broken or damaged.

Additional Information

Unit Dose

100 Tablets (10 x 10)

Store at room temperature in a dry place.

Re-order No.: 700836 M-95 Rev. 11/16

Metadata

Product Details

UPC / SKU3 09046 60961 2
DSLD Entry Date2019-05-28
Product TypeMineral
FormTablet or Pill
DSLD ID202154
Data Updated2026-04-11
Research

Research Evidence

7
Research Sources
45
Avg Quality
6
Rct
1
Meta Analysis
C Effectiveness and safety of polyethylene-glycol-4000 versus sodium picosulphate plus magnesium oxide and citric acid for bowel cleansing before colonoscopy in children: A systematic review with meta-analysis
Meta Analysis Journal of pediatric gastroenterology and nutrition 2025 PubMed DOI
C A randomized controlled study of effects of dietary magnesium oxide supplementation on bone mineral content in healthy girls
Rct The Journal of clinical endocrinology and metabolism 2006 PubMed
C Senna Versus Magnesium Oxide for the Treatment of Chronic Constipation: A Randomized, Placebo-Controlled Trial
Rct The American journal of gastroenterology 2021 PubMed DOI
C The efficacy of magnesium oxide and sodium valproate in prevention of migraine headache: a randomized, controlled, double-blind, crossover study.
Rct Acta neurologica Belgica PubMed DOI
C A randomized, double-blind, placebo-controlled, multicenter study assessing the efficacy of magnesium oxide monohydrate in the treatment of nocturnal leg cramps.
Rct Nutrition journal PubMed DOI
C Comparative study between manitol and sodium picosulfate with magnesium oxide solutions in the preparation for colonoscopy.
Rct Revista do Colegio Brasileiro de Cirurgioes PubMed DOI
C Effect of magnesium oxide or citrate supplements on metabolic risk factors in kidney stone formers with idiopathic hyperoxaluria: a randomized clinical trial.
Rct Magnesium research PubMed DOI
View all evidence for Magnesium Oxide →
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.