Jarrow Formulas Magnesium Optimizer supplement bottle
Jarrow Formulas

Magnesium Optimizer

What We Researched
4 active ingredients analyzed · 8 inactive ingredients decoded · 5 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
78
Product Score Fair
83
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin B6 (as Pyridoxal 5-Phosphate) 2 mg 118%
Magnesium (as Magnesium Malate) 100 mg 24%
Potassium (as Potassium Citrate) 50 mg 1%
Taurine 350 mg
Bioavailability Very Good

Absorption Rating

  • Vitamin B6 (as Pyridoxal 5-Phosphate) Fair
  • Magnesium (as Magnesium Malate) Good
  • Potassium (as Potassium Citrate) Good
  • Taurine Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Calcium Carbonate
  • Hydroxypropyl Cellulose
  • Croscarmellose Sodium
  • Magnesium Stearate
  • Hydroxypropylmethylcellulose
  • Glycerin
  • Silicon Dioxide
Efficacy Poor

Dosage Analysis

  • Vitamin B6 (as Pyridoxal 5-Phosphate) 2 mg Effective
  • Magnesium (as Magnesium Malate) 100 mg Under-dosed
  • Potassium (as Potassium Citrate) 50 mg Under-dosed
  • Taurine 350 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin B6 (as Pyridoxal 5-Phosphate) 2 mg 118%
Magnesium (as Magnesium Malate) 100 mg 24%
Potassium (as Potassium Citrate) 50 mg 1%
Taurine 350 mg

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.

Calcium Carbonate Safe

Acts as a filler and provides supplemental calcium.

Hydroxypropyl Cellulose Safe

Binds tablet ingredients and can form tablet coatings.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Hydroxypropylmethylcellulose Unknown
Glycerin Safe

Retains moisture and helps dissolve ingredients in softgels and liquids.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

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
Jarrow Formulas

Founded 1977 · Los Angeles, California, USA · 138 products · jarrow.com/

Certifications

5 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Non Gmo Project Verified Source
Usda Organic Verified Source
Vegan Certified Verified Source

Transparency

3 claims
Third Party Testing Claim — Verified Source
In House Testing — Verified Source

Violation History

2 incidents
Recall Liquid L-Carnitine2018-01-15Source
Prop 65 Lead2017-09-07Source
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Frequently Asked Questions
Is Jarrow Formulas Magnesium Optimizer a good supplement?

Jarrow Formulas Magnesium Optimizer received a product quality score of 78/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 4 active ingredients with 100 servings per container. Of the 8 inactive ingredients, 7 are rated safe and 0 are flagged for review. The manufacturer, Jarrow Formulas, holds a brand trust score of 83/100 with 5 verified certifications including Consumerlab, Fda Gmp Inspections, Non Gmo Project, Usda Organic.

What are the ingredients in Jarrow Formulas Magnesium Optimizer?

Jarrow Formulas Magnesium Optimizer contains 4 active ingredients: Vitamin B6 (as Pyridoxal 5-Phosphate) (2 mg), Magnesium (as Magnesium Malate) (100 mg), Potassium (as Potassium Citrate) (50 mg), Taurine (350 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Jarrow Formulas Magnesium Optimizer safe to take?

Jarrow Formulas Magnesium Optimizer has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Jarrow Formulas a trustworthy supplement brand?

Jarrow Formulas receives a brand trust score of 83/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1977 and headquartered in Los Angeles, California, USA, the company offers 138 products in their lineup. They hold 5 verified certifications including Consumerlab, Fda Gmp Inspections, Non Gmo Project, Usda Organic. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Jarrow Formulas 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 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.