Get the App
Natrol Magnesium Glycinate High Absorption 240 mg supplement bottle
Natrol

Magnesium Glycinate High Absorption 240 mg Review

What We Researched

GoodSupp analyzed 1 active ingredient and 2 inactive ingredients listed for Natrol Magnesium Glycinate High Absorption 240 mg. Its current algorithmic Product Score is 100/100. The score evaluates available label transparency, ingredient forms, dosing data, and additives; it does not establish clinical effectiveness.

1 active ingredient analyzed · 2 inactive ingredients decoded · 7 brand certifications checked · Source: IHERB · Label review date: Not available in source data · Brand research last checked:

Brand research: Natrol. These records concern the brand or named products; they do not establish testing of this particular supplement.

Public evidence for Natrol
SourceFindings
Brand quality statementNatrol says every finished-product lot is tested for safety, quality, strength, composition and consistency.
ConsumerLabConsumerLab's public Tested Brands table lists Natrol with 3 tested products. Approval and Top Pick outcomes are masked behind membership and were not inferred.
LabdoorNatrol Melatonin Fast Dissolve 10mg — A; Natrol Melatonin Time Release 5mg — A; Natrol Biotin Maximum Strength — A. Search results can be fuzzy; only exact brand-title matches were accepted.
Health Canada LNHPDHealth Canada lists 8 product records for Natrol. 3 exact visible row(s) were separated from substring collisions. Sample registry row: 80047741 — NATROL Melatonin 5mg Fast Dissolve — Cancelled. Registry inclusion is product/entity scoped and does not establish independent testing.

Company statements are identified as claims. Publisher listings and regulatory records apply to the products, facilities and dates described. A missing public listing does not establish that testing never occurred.

Method: GoodSupp compares the recorded supplement label, ingredient forms, quantities and additives. Brand records are assessed separately. Product scores describe the available data and do not replace laboratory testing of this product or batch.

100
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
Magnesium (as Magnesium Glycinate) 240 mg 57%
Bioavailability Excellent

Absorption Rating

  • Magnesium (as Magnesium Glycinate) Good
Other Ingredients Excellent

Fillers & Additives

  • Hypromellose
  • Magnesium Stearate
Efficacy Excellent

Dosage Analysis

  • Magnesium (as Magnesium Glycinate) 240 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Magnesium (as Magnesium Glycinate) 240 mg 57%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Brand Trust Report
Natrol

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

Certifications

7 certifications
Consumerlab Source available Primary evidence
Npa Gmp Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence
Nsf Gmp Source available Primary evidence
USP Verified Supporting evidence unavailable
IGEN Non-GMO Tested Supporting evidence unavailable
NSF Certified Supporting evidence unavailable

Transparency

5 claims
Third Party Testing Claim — Verified Evidence available Evidence
Testing Lab Disclosure — Claimed Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Contains Proprietary Blend — True Brand claim; evidence unavailable

Violation History

8 incidents
Lawsuit Marketing Relax+ Ultimate Calm as a treatment for anxiety.Recent Source available Primary source
Lawsuit Falsely advertising '100% Drug-Free' on Liquid Melatonin which allegedly contains ethyl alcohol.2021 Source available Primary source
Lawsuit False and deceptive claims about the memory-improving capabilities of Cognium supplements.2021 Source available Primary source
Fda Warning Public health warning against the purchase and consumption of unregistered food supplements.2020-07-21 Source available Primary source
Lawsuit Claims that their biotin products were ineffective.2017 Source available Primary source
Lawsuit Falsely advertising the joint health benefits of their glucosamine and chondroitin products.2013 Source available Primary source
Lawsuit Deceptive marketing claims regarding L-Arginine supplements.2013 Source available Primary source
Prop 65 Not specified in the article2002-04-22 Source available Primary source
Related Supplements
Nature's Bounty High Absorption Magnesium Glycinate 240 mg
Nature's Bounty High Absorption Magnesium Glycinate 240 mg
Product 100 Brand 100
365 by Whole Foods Market Magnesium Bisglycinate 300 mg
365 by Whole Foods Market Magnesium Bisglycinate 300 mg
Product 100 Brand 100
Nature's Bounty Calcium 600 mg + 20 mcg of Vitamin D3
Nature's Bounty Calcium 600 mg + 20 mcg of Vitamin D3
Product 100 Brand 100
Natrol Biotin
Natrol Biotin
Product 100 Brand 96
Natrol Vitamin D3
Natrol Vitamin D3
Product 100 Brand 96
Natrol Biotin 5,000 mcg Fast Dissolve Strawberry
Natrol Biotin 5,000 mcg Fast Dissolve Strawberry
Product 100 Brand 96
Frequently Asked Questions
What testing evidence is available for Natrol?

The September 3, 2026 review found public listings from ConsumerLab, Labdoor. The evidence table identifies the products or company listings covered. A publisher listing does not mean every product has passed testing.

Is Natrol Magnesium Glycinate High Absorption 240 mg a good supplement?

Natrol Magnesium Glycinate High Absorption 240 mg received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 30 servings per container. All 2 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Natrol, holds a brand trust score of 96/100.

What are the ingredients in Natrol Magnesium Glycinate High Absorption 240 mg?

Natrol Magnesium Glycinate High Absorption 240 mg contains 1 active ingredients: Magnesium (as Magnesium Glycinate) (240 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

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.

Scan Any Supplement Instantly

Download GoodSupp to scan barcodes, check ingredient safety, and find the best supplements for your needs.

Download on App Store Browse All Supplements
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.