Optimum Nutrition Zinc Magnesium Aspartate supplement bottle
Optimum Nutrition

Zinc Magnesium Aspartate

What We Researched
3 active ingredients analyzed · 3 inactive ingredients decoded · 9 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
93
Product Score Excellent
92
Brand Score Excellent

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin B6 (as pyridoxine hydrochloride) 10 mg 588%
Magnesium (as magnesium aspartate, magnesium oxide) 435 mg 104%
Zinc (as zinc aspartate, zinc monomethionine, zinc oxide) 28 mg 255%
Bioavailability Very Good

Absorption Rating

  • Vitamin B6 (as pyridoxine hydrochloride) Fair
  • Magnesium (as magnesium aspartate, magnesium oxide) Good
  • Zinc (as zinc aspartate, zinc monomethionine, zinc oxide) Good
Other Ingredients Excellent

Fillers & Additives

  • Gelatin
  • Microcrystalline Cellulose
  • Magnesium Stearate
Efficacy Excellent

Dosage Analysis

  • Vitamin B6 (as pyridoxine hydrochloride) 10 mg Effective
  • Magnesium (as magnesium aspartate, magnesium oxide) 435 mg High
  • Zinc (as zinc aspartate, zinc monomethionine, zinc oxide) 28 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Vitamin B6 (as pyridoxine hydrochloride) 10 mg 588%
Magnesium (as magnesium aspartate, magnesium oxide) 435 mg 104%
Zinc (as zinc aspartate, zinc monomethionine, zinc oxide) 28 mg 255%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Price Comparison

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Optimum Nutrition

Founded 1986 · Downers Grove, IL, United States · 95 products · optimumnutrition.com

Certifications

9 certifications
Consumerlab Verified Source
Informed Sport Verified Source
Labdoor Verified Source
Nsf Certified For Sport Verified Source
Usda Organic Verified Source
Vegan Certified Verified Source
Fda Gmp Inspections Verified Source
Non Gmo Project Verified Source
Nsf Gmp Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Testing Lab Disclosure — Claimed Source
In House Testing — Verified Source

Violation History

5 incidents
Prop 65 Lead2025-07-21Source
Prop 65 Lead2024-11-22Source
Recall Various nutritional and beverage products2022-07-28Source
Prop 65 Lead2017-03-10Source
Lawsuit Deceptive claims about the plant-based enzyme 'Aminogen' and its effect on protein digestion and absorption.2013Source
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Frequently Asked Questions
Is Optimum Nutrition Zinc Magnesium Aspartate a good supplement?

Optimum Nutrition Zinc Magnesium Aspartate 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 3 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, Optimum Nutrition, holds a brand trust score of 92/100 with 9 verified certifications including Consumerlab, Informed Sport, Labdoor, Nsf Certified For Sport.

What are the ingredients in Optimum Nutrition Zinc Magnesium Aspartate?

Optimum Nutrition Zinc Magnesium Aspartate contains 3 active ingredients: Vitamin B6 (as pyridoxine hydrochloride) (10 mg), Magnesium (as magnesium aspartate, magnesium oxide) (435 mg), Zinc (as zinc aspartate, zinc monomethionine, zinc oxide) (28 mg). Notable high-dose ingredients include Vitamin B6 at 588% DV, Zinc at 255% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Optimum Nutrition Zinc Magnesium Aspartate safe to take?

Optimum Nutrition Zinc Magnesium Aspartate has been analyzed for ingredient safety across all its components. All 3 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 Optimum Nutrition a trustworthy supplement brand?

Optimum Nutrition receives a brand trust score of 92/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1986 and headquartered in Downers Grove, IL, United States, the company offers 95 products in their lineup. They hold 9 verified certifications including Consumerlab, Informed Sport, Labdoor, Nsf Certified For Sport. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Optimum Nutrition has 5 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 250,000 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 250,000 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. 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.