tnvitamins Magnesium Complex 400 mg supplement bottle
tnvitamins

Magnesium Complex 400 mg Review

What We Researched
1 active ingredient analyzed · 5 inactive ingredients decoded · 1 brand certification checked · Last updated: Aug 2026
93
Product Score Excellent
77
Brand Score Fair

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 Aspartate, Magnesium Citrate, Magnesium Oxide) 400 mg 100%
Bioavailability Excellent

Absorption Rating

  • Magnesium (as Magnesium Aspartate, Magnesium Citrate, Magnesium Oxide) Good
Other Ingredients Excellent

Fillers & Additives

  • Gelatin Capsule
  • Rice Powder
  • Vegetable Magnesium Stearate
  • Citric Acid
  • Silica
Efficacy Very Good

Dosage Analysis

  • Magnesium (as Magnesium Aspartate, Magnesium Citrate, Magnesium Oxide) 400 mg High

Supplement Facts

Ingredient Amount % Daily Value
Magnesium (as Magnesium Aspartate, Magnesium Citrate, Magnesium Oxide) 400 mg 100%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Gelatin Capsule Safe

It is used as a material for making capsules.

Rice Powder Safe

It is used as a filler or flow agent.

Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Citric Acid Safe

Adds tartness and acts as a natural preservative. Also aids in ingredient stability.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Brand Trust Report
tnvitamins

Founded 1979 · Deer Park, NY, USA · 136 products · tnvitamins.com/

Certifications

1 certification
Consumerlab Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source

Violation History

1 incident
Fda Warning Significant violations of Current Good Manufacturing Practice (CGMP) regulations for dietary supplements.2017-08-16Source
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Frequently Asked Questions
Is tnvitamins Magnesium Complex 400 mg a good supplement?

tnvitamins Magnesium Complex 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 All 5 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, tnvitamins, holds a brand trust score of 77/100 with 1 verified certifications including Consumerlab.

What are the ingredients in tnvitamins Magnesium Complex 400 mg?

tnvitamins Magnesium Complex 400 mg contains 1 active ingredients: Magnesium (as Magnesium Aspartate, Magnesium Citrate, Magnesium Oxide) (400 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is tnvitamins Magnesium Complex 400 mg safe to take?

tnvitamins Magnesium Complex 400 mg has been analyzed for ingredient safety across all its components. All 5 inactive ingredients — including capsule materials, fillers, and binders — are rated safe based on regulatory data and published safety research. This is a clean formulation with no controversial additives. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is tnvitamins a trustworthy supplement brand?

tnvitamins receives a brand trust score of 77/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1979 and headquartered in Deer Park, NY, USA, the company offers 136 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: tnvitamins has 1 historical regulatory incident 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.