🟢 100/100

This product looks safe

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

Product Label

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Label Data

0.25 tsp Serving Size
454 Servings
Mineral Product Type
100% Evidence Coverage

Supplement Facts — Evidence Check

290 mg (69% DV)
📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)
This product: 290mg

Other Ingredients

None

Label Claims — Verification

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

Target Groups

Vegan Vegetarian Adult (18 - 50 Years) Gluten Free Dairy Free

Product Information

📋 Directions for Use

Suggested Usage: Mix 1/4 level teaspoon of powder into at least 6 oz. of cold water or clear liquid. Take once daily with a meal. Pure Magnesium Oxide Powder can increase the temperature of liquids upon contact; therefore, the recommended serving must be mixed into at least 6 oz. of cold liquid to neutralize this reaction prior to ingestion.

⚠️ Warnings & Precautions

Caution: This product must be dissolved into at least 6 oz. of cold water or clear liquid before consuming. Do not breathe powder and avoid contact with skin, eyes, and clothing. For adults only.

Consult physician if pregnant/nursing, taking medication, or have a medical condition.

Keep out of reach of children.

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens.

🧪 Formulation Notes

Non-GMO

Vegetarian/Vegan

Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients.

Additional Information

Magnesium is a mineral that is critical for energy production and metabolism, muscle contraction, nerve impulse transmission, and bone mineralization.* It is a required cofactor for an estimated 300 enzymes.* Among the reactions catalyzed by these enzymes are fatty acid synthesis, protein synthesis, and glucose metabolism.* Magnesium status is also important for regulation of calcium balance through its effects on the parathyroid gland.*

Natural color variation may occur in this product.

CODE 1310 V5

Nervous system support*

~ Supports energy production* ~ Critical for enzyme function*

NON GMO Project Verified nongmoproject.org

Minerals

Family owned since 1968.

Store in a cool, dry place after opening.

Please recycle.

GMP Quality Assured

This product is sold by weight not volume.

Product Details

UPC / SKU 7 33739 01310 1
DSLD Entry Date 2017-04-25
Product Type Mineral
Form Powder
Brand NOW
DSLD ID 72119
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
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
C Senna Versus Magnesium Oxide for the Treatment of Chronic Constipation: A Randomized, Placebo-Controlled Trial
Rct The American journal of gastroenterology 2021
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
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
C Comparative study between manitol and sodium picosulfate with magnesium oxide solutions in the preparation for colonoscopy.
Rct Revista do Colegio Brasileiro de Cirurgioes
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
View all evidence for Magnesium Oxide →

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