Olympian Labs Magnesium Citrate 133 mg supplement bottle
Olympian Labs

Magnesium Citrate 133 mg Review

What We Researched
1 active ingredient analyzed · 5 inactive ingredients decoded · 2 brand certifications checked · Page generated: Sep 2026
93
Product Score Excellent
71
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 citrate) 400 mg 95%
Bioavailability Excellent

Absorption Rating

  • Magnesium (as magnesium citrate) Good
Other Ingredients Excellent

Fillers & Additives

  • Vegetarian Capsule (HPMC)
  • Microcrystalline Cellulose (Plant Fiber)
  • Ascorbyl Palmitate
  • Silicon Dioxide
  • Rice Flour
Efficacy Very Good

Dosage Analysis

  • Magnesium (as magnesium citrate) 400 mg High

Supplement Facts

Ingredient Amount % Daily Value
Magnesium (as magnesium citrate) 400 mg 95%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetarian Capsule (HPMC) Safe

It is used to encapsulate supplement ingredients for easy consumption by vegetarians.

Microcrystalline Cellulose (Plant Fiber) Safe

It is used as a filler, binder, and disintegrant.

Ascorbyl Palmitate Safe

Prevents oxidation and extends shelf life of oil-based supplements.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Rice Flour Safe

Natural bulking agent to fill capsule space. Hypoallergenic.

Brand Trust Report
Olympian Labs

Founded 1992 · Phoenix, Arizona, United States · 282 products · olympianlabsshop.com/

Certifications

2 certifications
Consumerlab Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence

Transparency

2 claims
Third Party Testing Claim — Claimed Evidence available Evidence

Violation History

2 incidents
Prop 65 Lead2018-09-05 Source available Primary source
Lawsuit Allegations that the products 'Medi-Phen' and 'Herp-Eeze' were not safe or effective for their advertised purposes of weight loss and relief of Herpes simplex viruses, respectively.2002 Source available Primary source
Related Supplements
Frequently Asked Questions
Is Olympian Labs Magnesium Citrate 133 mg a good supplement?

Olympian Labs Magnesium Citrate 133 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 100 servings per container. All 5 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Olympian Labs, holds a brand trust score of 71/100.

What are the ingredients in Olympian Labs Magnesium Citrate 133 mg?

Olympian Labs Magnesium Citrate 133 mg contains 1 active ingredients: Magnesium (as magnesium citrate) (400 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Olympian Labs Magnesium Citrate 133 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Olympian Labs Magnesium Citrate 133 mg. All 5 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 Olympian Labs a trustworthy supplement brand?

Olympian Labs receives a brand trust score of 71/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1992 and headquartered in Phoenix, Arizona, United States, the company offers 282 products in their lineup. Note: Olympian Labs has 2 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.