Best Naturals Calcium Magnesium D3, 1500 mg supplement bottle
Best Naturals

Calcium Magnesium D3, 1500 mg

What We Researched
3 active ingredients analyzed · 4 inactive ingredients decoded · 1 brand certification checked · 1 retailer compared · Last updated: Mar 2026
77
Product Score Fair
67
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D (as d-3 cholecalciferol) 10 mcg (400 IU) 50%
Calcium (as calcium carbonate) 1,000 mg 77%
Magnesium (as magnesium oxide) 500 mg 119%
Bioavailability Fair

Absorption Rating

  • Vitamin D (as d-3 cholecalciferol) Good
  • Calcium (as calcium carbonate) Fair
  • Magnesium (as magnesium oxide) Poor
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Stearic Acid (Vegetable Source)
  • Silicon Dioxide
  • Pharmaceutical Glaze
Efficacy Fair

Dosage Analysis

  • Vitamin D (as d-3 cholecalciferol) 10 mcg (400 IU) Under-dosed
  • Calcium (as calcium carbonate) 1,000 mg Effective
  • Magnesium (as magnesium oxide) 500 mg High

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D (as d-3 cholecalciferol) 10 mcg (400 IU) 50%
Calcium (as calcium carbonate) 1,000 mg 77%
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.

Stearic Acid (Vegetable Source) Generally_safe

It is used as a lubricant and release agent.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Pharmaceutical Glaze Generally_safe

It is used to coat tablets or capsules for easier swallowing or controlled release.

Price Comparison

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

Brand Trust Report
Best Naturals

Founded 2012 · Piscataway, New Jersey, USA · 129 products · shopbestnaturals.com

Certifications

1 certification
Consumerlab Verified Source

Transparency

3 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source

Violation History

2 incidents
Prop 65 Lead and lead compounds2021-12-29Source
Lawsuit Falsely advertising krill oil supplements that allegedly contain no krill.2021Source
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Frequently Asked Questions
Is Best Naturals Calcium Magnesium D3, 1500 mg a good supplement?

Best Naturals Calcium Magnesium D3, 1500 mg received a product quality score of 77/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 3 active ingredients with 60 servings per container. Of the 4 inactive ingredients, 2 are rated safe and 0 are flagged for review. The manufacturer, Best Naturals, holds a brand trust score of 67/100 with 1 verified certifications including Consumerlab.

What are the ingredients in Best Naturals Calcium Magnesium D3, 1500 mg?

Best Naturals Calcium Magnesium D3, 1500 mg contains 3 active ingredients: Vitamin D (as d-3 cholecalciferol) (10 mcg (400 IU)), Calcium (as calcium carbonate) (1,000 mg), Magnesium (as magnesium oxide) (500 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Best Naturals Calcium Magnesium D3, 1500 mg safe to take?

Best Naturals Calcium Magnesium D3, 1500 mg has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Best Naturals a trustworthy supplement brand?

Best Naturals receives a brand trust score of 67/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2012 and headquartered in Piscataway, New Jersey, USA, the company offers 129 products in their lineup. They hold 1 verified certifications including Consumerlab. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Best Naturals has 2 historical regulatory incidents on record, which are factored into the trust score.

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.