🟢 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

📸

Have a supplement label? Find it here.

Upload a photo of any supplement label to search our database of 92,312 products.

Label Data

1 Vegetarian Capsule(s) Serving Size
120 Servings
Mineral Product Type
100% Evidence Coverage

Supplement Facts — Evidence Check

300 mg (71% DV)
📊 Market median: 4002.0mg (1 products) 📚 20 studies (Tier A: 0, B: 2)
This product: 300mg

Other Ingredients

Capsule Microcrystalline Cellulose Silica Rice Bran

Label Claims — Verification

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

Target Groups

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

Product Information

📋 Directions for Use

Suggested use: As a dietary supplement, adults take one (1) vegetarian capsule daily, or as directed by a health care professional.

⚠️ Warnings & Precautions

Caution: As with any supplement, consult your healthcare practitioner before using this product, especially if you are pregnant, nursing, or are under medical supervision for any reason.

Keep out of reach of children.

For serious adverse event reporting call (877) 455-2826.

🧪 Formulation Notes

We only put our name on formulas that meet our unrivaled quality standards, and we continue raising the bar on these standards without raising the bar on your budget. Our supplements are GMP (Good Manufacturing Practices) certified, ingredient verified, screened for heavy metals, and formulated without questionable fillers, artificial colors, sweeteners, flavors, and other problematic ingredients. We scrutinize every detail, so you don't have to, because we are, and always have been, your Original good4u Grocers. To your health, - The Isely Family

Our supplements are GMP (Good Manufacturing Practices) certified, ingredient verified, screened for heavy metals, and formulated without questionable fillers, artificial colors, sweeteners, flavors, and other problematic ingredients.

Nerve support

Gluten free

Vegetarian

BPA Free

Contains no: Sugar, salt, dairy, yeast, wheat, gluten, corn, soy, preservatives, magnesium stearate, artificial colors or flavors.

Additional Information

Our unique story It was 1955 when Margaret and Philip Isely started Natural Grocers with $200 and a dream to make healthy living attainable for everyone. Now this family legacy is evolving with Natural Grocers Brand supplements, bringing you premium quality products at Always Affordable prices.

GMP Good Manufacturing Practice

Made in USA

Store in a cool, dry place and away from direct light.

Product Details

UPC / SKU 8 49327 00314 7
DSLD Entry Date 2021-10-22
Product Type Mineral
Form Capsule
DSLD ID 256865
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 →

Compare Similar Products

View all Magnesium Oxide products →