Natrol Calcium With Magnesium supplement bottle
Natrol

Calcium With Magnesium Review

What We Researched
3 active ingredients analyzed · 17 inactive ingredients decoded · 7 brand certifications checked · Last updated: Aug 2026
95
Product Score Excellent
96
Brand Score Excellent

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Calcium (as Calcium, Magnesium Krebs) 500 mg 50%
Magnesium (as Calcium, Magnesium Krebs) 200 mg 50%
Fruit Base 540 mg
Bioavailability Very Good

Absorption Rating

  • Calcium (as Calcium, Magnesium Krebs) Good
  • Magnesium (as Calcium, Magnesium Krebs) Good
  • Fruit Base Fair
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Cellulose Gum
  • Silica
  • Stearic Acid
  • Magnesium Stearate
  • Methylcellulose
  • Glycerin
  • Gum Arabic
  • Citric Acid Anhydrous
  • Water
  • Malic Acid
  • Calcium Carbonate
  • Fumaric Acid
  • Lime
  • Magnesium Oxide
  • Succinic Acid
  • Alpha-Ketoglutarate
Efficacy Excellent

Dosage Analysis

  • Calcium (as Calcium, Magnesium Krebs) 500 mg Effective
  • Magnesium (as Calcium, Magnesium Krebs) 200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Calcium (as Calcium, Magnesium Krebs) 500 mg 50%
Magnesium (as Calcium, Magnesium Krebs) 200 mg 50%
Fruit Base 540 mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Cellulose Gum Safe

Thickens and stabilizes supplement formulations.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Methylcellulose Generally_safe

It is used as a thickener or binder.

Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Gum Arabic Safe

It is used as a thickener, binder, or emulsifier.

Citric Acid Anhydrous Unknown
Water Safe

Dissolves and carries water-soluble ingredients.

Malic Acid Safe

Adds tartness and enhances fruit flavors in gummies and chewables.

Calcium Carbonate Safe

Acts as a filler and provides supplemental calcium.

Fumaric Acid Generally_safe

It is used as an acidity regulator or flavoring agent.

Lime Unknown
Magnesium Oxide Generally_safe

It is used to provide magnesium, an essential mineral.

Succinic Acid Safe

It is used as a buffering agent.

Alpha-Ketoglutarate Unknown
Brand Trust Report
Natrol

Founded 1980 · Chatsworth, California, USA · 319 products · natrol.com

Certifications

7 certifications
Consumerlab Verified Source
Npa Gmp Verified Source
Fda Gmp Inspections Verified Source
Nsf Gmp Verified Source
USP Verified Verified
IGEN Non-GMO Tested Verified
NSF Certified Verified

Transparency

5 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed Source
In House Testing — Verified Source
Contains Proprietary Blend — True

Violation History

8 incidents
Lawsuit Marketing Relax+ Ultimate Calm as a treatment for anxiety.RecentSource
Lawsuit Falsely advertising '100% Drug-Free' on Liquid Melatonin which allegedly contains ethyl alcohol.2021Source
Lawsuit False and deceptive claims about the memory-improving capabilities of Cognium supplements.2021Source
Fda Warning Public health warning against the purchase and consumption of unregistered food supplements.2020-07-21Source
Lawsuit Claims that their biotin products were ineffective.2017Source
Lawsuit Falsely advertising the joint health benefits of their glucosamine and chondroitin products.2013Source
Lawsuit Deceptive marketing claims regarding L-Arginine supplements.2013Source
Prop 65 Not specified in the article2002-04-22Source
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Frequently Asked Questions
Is Natrol Calcium With Magnesium a good supplement?

Natrol Calcium With Magnesium received a product quality score of 95/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 3 active ingredients with 40 servings per container. Of the 17 inactive ingredients, 11 are rated safe and 0 are flagged for review. The manufacturer, Natrol, holds a brand trust score of 96/100 with 7 verified certifications including Consumerlab, Npa Gmp, Fda Gmp Inspections, Nsf Gmp.

What are the ingredients in Natrol Calcium With Magnesium?

Natrol Calcium With Magnesium contains 3 active ingredients: Calcium (as Calcium, Magnesium Krebs) (500 mg), Magnesium (as Calcium, Magnesium Krebs) (200 mg), Fruit Base (540 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Natrol Calcium With Magnesium safe to take?

Natrol Calcium With Magnesium 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 Natrol a trustworthy supplement brand?

Natrol receives a brand trust score of 96/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1980 and headquartered in Chatsworth, California, USA, the company offers 319 products in their lineup. They hold 7 verified certifications including Consumerlab, Npa Gmp, Fda Gmp Inspections, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Natrol has 8 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 150,000 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 150,000 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 — read our methodology. 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.