GNC Magnesium Glycinate 200mg - 120 Caplets supplement bottle
GNC

Magnesium Glycinate 200mg - 120 Caplets Review

What We Researched
1 active ingredient analyzed · 6 inactive ingredients decoded · 10 brand certifications checked · Page generated: Sep 2026
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 Bisglycinate Chelate) 200 mg 48%
Bioavailability Excellent

Absorption Rating

  • Magnesium (as Magnesium Bisglycinate Chelate) Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Croscarmellose Sodium
  • Stearic Acid Vegetable Source
  • Silicon Dioxide
  • Magnesium Stearate Vegetable Source
  • White Film Coating (Calcium Carbonate, Hydroxypropyl Methylcellulose, Isomalt, Medium Chain Triglycerides)
Efficacy Excellent

Dosage Analysis

  • Magnesium (as Magnesium Bisglycinate Chelate) 200 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Magnesium (as Magnesium Bisglycinate Chelate) 200 mg 48%

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.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Stearic Acid Vegetable Source Unknown
Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Magnesium Stearate Vegetable Source Unknown
White Film Coating (Calcium Carbonate, Hydroxypropyl Methylcellulose, Isomalt, Medium Chain Triglycerides) Unknown
Brand Trust Report
GNC

Founded 1935 · Pittsburgh, Pennsylvania, USA · 1590 products · gnc.com

Certifications

10 certifications
Informed Sport Source available Primary evidence
Nsf Certified For Sport Source available Primary evidence
Clean Label Project Source available Primary evidence
Labdoor Source available Primary evidence
Consumerlab Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence
Usda Organic Source available Primary evidence
Vegan Certified Source available Primary evidence
Nsf Gmp Source available Primary evidence
Informed Choice Supporting evidence unavailable

Transparency

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

Violation History

34 incidents
Prop 65 Not specified on product pageOngoing Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-13 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-13 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-09 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-06-05 Source available Primary source
Recall GNC Women's 30+ Vitapak2025-04-25 Source available Primary source
Lawsuit Misrepresentation of the amount of elemental magnesium in 'Super Magnesium' supplements.2024 Source available Primary source
Lawsuit Misrepresentation of the amount of elemental magnesium in 'Super Magnesium' supplements.2024 Source available Primary source
Lawsuit Mislabeled magnesium content in 'Super Magnesium' supplements.2024 Source available Primary source
Lawsuit Misrepresentation of magnesium content in 'Super Magnesium' supplements.2024 Source available Primary source
Recall GNC Women's Ultra Mega, Women's Ultra Mega Active, Women's Ultra Mega Energy and Metabolism, and Prenatal Formula with Iron2023-01-12 Source available Primary source
Lawsuit Falsely advertising 'Total Lean' protein bars as 'lean'.2023 Source available Primary source
Lawsuit Selling Vitamin E Skin Oil that was primarily composed of vegetable oil.2020 Source available Primary source
Lawsuit Selling Vitamin E Skin Oil that was mostly vegetable oil.2020 Source available Primary source
Prop 65 Lead, Cadmium2019-02-07 Source available Primary source
Prop 65 Lead and/or Cadmium2019-02-07 Source available Primary source
Prop 65 Lead, Cadmium2019-02-07 Source available Primary source
Prop 65 Lead, Cadmium2019-02-07 Source available Primary source
Prop 65 lead and/or cadmium2019-02-07 Source available Primary source
Lawsuit Deceptively labeling dietary supplements as if they have FDA approval.2019 Source available Primary source
Lawsuit Deceptively advertising fake markdowns online to mislead consumers into thinking items were on 'sale.'2019 Source available Primary source
Lawsuit Deceptively labeling dietary supplements regarding FDA approval and failing to include required disclaimers.2019 Source available Primary source
Lawsuit Using fake 'original' prices to deceive customers.2019 Source available Primary source
Recall Women's Iron Complete Dietary Supplement 60-count caplets2018-12-19 Source available Primary source
Prop 65 Lead2018-10-12 Source available Primary source
Prop 65 Lead2018-10-12 Source available Primary source
Recall Various GNC Women's Multivitamins2018-01-04 Source available Primary source
Recall GNC Women's Ultra Mega Time Release2016-11-18 Source available Primary source
Recall GNC Women's Ultra Mega Time Release 180-count2016-11-16 Source available Primary source
Lawsuit Knowingly selling products containing unlawful synthetic chemicals (picamilon, BMPEA, and acacia rigidula).2016 Source available Primary source
Lawsuit Unfair discontinuation of the Gold Card discount program.2016 Source available Primary source
Fda Warning Inclusion of unapproved dietary ingredient Beta-methylphenethylamine (BMPEA) in products.2015-04-01 Source available Primary source
Lawsuit Mislabeling of herbal supplements2015 Source available Primary source
Lawsuit Selling products containing illegal synthetic ingredients.2015 Source available Primary source
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Frequently Asked Questions
Is GNC Magnesium Glycinate 200mg - 120 Caplets a good supplement?

GNC Magnesium Glycinate 200mg - 120 Caplets 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 60 servings per container. Of the 6 inactive ingredients, 3 are rated safe and 0 ingredients are flagged for review. The manufacturer, GNC, holds a brand trust score of 96/100.

What are the ingredients in GNC Magnesium Glycinate 200mg - 120 Caplets?

GNC Magnesium Glycinate 200mg - 120 Caplets contains 1 active ingredients: Magnesium (as Magnesium Bisglycinate Chelate) (200 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is GNC Magnesium Glycinate 200mg - 120 Caplets safe to take?

GoodSupp reviewed the inactive-ingredient data available for GNC Magnesium Glycinate 200mg - 120 Caplets. 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 GNC a trustworthy supplement brand?

GNC receives a brand trust score of 96/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1935 and headquartered in Pittsburgh, Pennsylvania, USA, the company offers 1590 products in their lineup. Note: GNC has 34 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.