Nature's Lab Magnesium Glycinate 400 mg supplement bottle
Nature's Lab

Magnesium Glycinate 400 mg Review

What We Researched
1 active ingredient analyzed · 3 inactive ingredients decoded · 6 brand certifications checked · Page generated: Sep 2026
93
Product Score Excellent
97
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 Chelate, Magnesium Oxide) 400 mg 95%
Bioavailability Excellent

Absorption Rating

  • Magnesium (as Magnesium Glycinate Chelate, Magnesium Oxide) Good
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Gelatin
  • Magnesium Stearate
Efficacy Very Good

Dosage Analysis

  • Magnesium (as Magnesium Glycinate Chelate, Magnesium Oxide) 400 mg High

Supplement Facts

Ingredient Amount % Daily Value
Magnesium (as Magnesium Glycinate Chelate, Magnesium Oxide) 400 mg 95%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Brand Trust Report
Nature's Lab

Founded 2011 · Las Vegas, Nevada, United States · 65 products · natureslab.com/

Certifications

6 certifications
Fda Gmp Inspections Source available Primary evidence
USP Verified Supporting evidence unavailable
IGEN Non-GMO Tested Supporting evidence unavailable
USDA Organic Supporting evidence unavailable
Non-GMO Project Verified Supporting evidence unavailable
Gluten-Free Certified Supporting evidence unavailable

Transparency

4 claims
Third Party Testing Claim — Verified Evidence available Evidence
In House Testing — Verified Evidence available Evidence
Testing Lab Disclosure — True Brand claim; evidence unavailable

Violation History

3 incidents
Fda Warning Serious violations of FDA's regulations for Current Good Manufacturing Practice (CGMP) in Manufacturing, Packaging, Labeling, or Holding Operations for Dietary Supplements. Specifically, failure to establish required specifications for points, steps, or stages in the manufacturing process where control is necessary to ensure the quality of the dietary supplement.2022-07-12 Source available Primary source
Prop 65 Not specified in the notice summary2020-11-25 Source available Primary source
Fda Warning Letter FDA Warning Letter Source available Primary source
Related Supplements
Frequently Asked Questions
Is Nature's Lab Magnesium Glycinate 400 mg a good supplement?

Nature's Lab Magnesium Glycinate 400 mg received a product quality score of 93/100 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 3 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Nature's Lab, holds a brand trust score of 97/100.

What are the ingredients in Nature's Lab Magnesium Glycinate 400 mg?

Nature's Lab Magnesium Glycinate 400 mg contains 1 active ingredients: Magnesium (as Magnesium Glycinate Chelate, Magnesium Oxide) (400 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Lab Magnesium Glycinate 400 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Nature's Lab Magnesium Glycinate 400 mg. All 3 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Nature's Lab a trustworthy supplement brand?

Nature's Lab receives a brand trust score of 97/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 2011 and headquartered in Las Vegas, Nevada, United States, the company offers 65 products in their lineup. Note: Nature's Lab has 3 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.