Major Magnesium 500 mg supplement bottle
Major

Magnesium 500 mg

What We Researched
1 active ingredient analyzed · 14 inactive ingredients decoded · 2 retailers compared · Last updated: Mar 2026
43
Product Score Poor

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Magnesium (as Magnesium Oxide) 500 mg 119%
Bioavailability Very Poor

Absorption Rating

  • Magnesium (as Magnesium Oxide) Poor
Other Ingredients Very Poor

Fillers & Additives

  • Microcrystalline Cellulose
  • Dicalcium Phosphate
  • Croscarmellose Sodium
  • Magnesium Stearate
  • Hypromellose
  • Titanium Dioxide High
  • Polyethylene Glycol Low
  • Poloxamer
  • Talc High
  • Triacetin
  • Crospovidone
  • Stearic Acid
  • Mineral Oil Medium
  • Sodium Lauryl Sulfate Low
Efficacy Very Good

Dosage Analysis

  • Magnesium (as Magnesium Oxide) 500 mg High

Supplement Facts

Ingredient Amount % Daily Value
Magnesium (as Magnesium Oxide) 500 mg 119%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Titanium Dioxide Caution

Used as a whitening agent in tablet coatings and capsules.

Polyethylene Glycol Caution

It is used as a binder, coating agent, or to improve solubility.

Poloxamer Unknown
Talc Avoid

It is used to improve powder flow and prevent clumping.

Triacetin Generally_safe

It is used as a solvent or humectant.

Crospovidone Generally_safe

It is used as a binder to help tablets or capsules disintegrate.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Mineral Oil Caution

It is used as a lubricant or emollient.

Sodium Lauryl Sulfate Caution

It is used to help mix oil and water-based ingredients.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$13$12$11$10$9 $10.82
Target

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Major

· 135 products

Transparency

1 claim
Related Supplements
Frequently Asked Questions
Is Major Magnesium 500 mg a good supplement?

Major Magnesium 500 mg received a product quality score of 43/100 in GoodSupp's independent analysis, indicating several areas of concern that consumers should review. The product contains 1 active ingredients Of the 14 inactive ingredients, 6 are rated safe and 4 are flagged for review.

What are the ingredients in Major Magnesium 500 mg?

Major Magnesium 500 mg contains 1 active ingredients: Magnesium (as Magnesium Oxide) (500 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Major Magnesium 500 mg safe to take?

Major Magnesium 500 mg has been analyzed for ingredient safety across all its components. Of 14 inactive ingredients, 6 are rated safe. 4 ingredients are flagged for review: Titanium Dioxide, Polyethylene Glycol, Mineral Oil. 'Caution' doesn't mean dangerous — it indicates the ingredient has some considerations worth being aware of, such as potential sensitivities or ongoing research. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

What is magnesium good for?

Magnesium Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding magnesium good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

How much magnesium per day?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What is zinc good for?

Zinc Good For is a topic many supplement consumers ask about. In the context of dietary supplements, understanding zinc good for helps you make more informed choices about what you put in your body. The quality and form of ingredients matters significantly — two products listing the same ingredient can differ dramatically in bioavailability and effectiveness. GoodSupp analyzes over 250,000 supplement products to help consumers understand exactly what's in their supplements and whether the formulation meets quality standards.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.