Magnesium Oxide 420 mg by Nationwide Pharmaceutical — Ingredients, Evidence & Safety

Product Label

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Label Data

1 Tablet(s) Serving Size

100 Servings

Mineral Product Type

100% Evidence Coverage

Supplement Facts — Evidence Check

Magnesium

252 mg (63% DV)

📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)

This product: 252mg

Other Ingredients

Microcrystalline Cellulose Croscarmellose Sodium Silicon Dioxide Stearic Acid Magnesium Stearate Titanium Dioxide Hypromellose

Label Claims — Verification

❓ All Other

❓ Structure/Function

All Other (100% of products) Structure/Function (78% of products) Nutrient (46% of products)

Target Groups

Adult (18 - 50 Years)

Product Information

📋 Directions for Use

Directions: Adults: Take one 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 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

🧪 Formulation Notes

Made in the USA

Additional Information

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

NDC 69375-0008-10

Product Details

UPC / SKU 3 69375 00810 4

DSLD Entry Date 2025-02-23

Product Type Mineral

Form Tablet or Pill

Brand Nationwide Pharmaceutical

DSLD ID 327373

Data Updated 2026-04-11

Research Evidence

7 Research Sources

45 Avg Quality Score

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 →