Life Extension Extend-Release Magnesium, 60 Vegetarian Capsules (250 mg per Capsule) supplement bottle
Life Extension

Extend-Release Magnesium, 60 Vegetarian Capsules (250 mg per Capsule)

What We Researched
1 active ingredient analyzed · 8 inactive ingredients decoded · 3 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
100
Product Score Excellent
86
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Magnesium (as ZumXR®magnesium oxide, magnesium citrate) 250 mg 60%
Bioavailability Excellent

Absorption Rating

  • Magnesium (as ZumXR®magnesium oxide, magnesium citrate) Good
Other Ingredients Excellent

Fillers & Additives

  • Vegetable Cellulose (Capsule)
  • Rice Fiber
  • Ethylcellulose
  • Microcrystalline Cellulose
  • Medium Chain Triglycerides
  • Stearic Acid
  • Oleic Acid
  • Silica
Efficacy Excellent

Dosage Analysis

  • Magnesium (as ZumXR®magnesium oxide, magnesium citrate) 250 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Magnesium (as ZumXR®magnesium oxide, magnesium citrate) 250 mg 60%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Vegetable Cellulose (Capsule) Safe

It is used as a material for making vegetarian capsules.

Rice Fiber Safe

It is used as a filler and to improve the texture of supplements.

Ethylcellulose Generally_safe

It is used as a coating to control the release of supplement ingredients.

Microcrystalline Cellulose Safe

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

Medium Chain Triglycerides Safe

Enhances absorption of fat-soluble vitamins.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Oleic Acid Safe
Silica Safe

Prevents ingredients from clumping and improves powder flow.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$12$11$10$9$8 Mar 12 $9.75
iHerb

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

Brand Trust Report
Life Extension

Founded 1980 · Fort Lauderdale, Florida, USA · 352 products · lifeextension.com

Certifications

3 certifications
Consumerlab Verified Source
Fda Gmp Inspections Verified Source
Nsf Gmp Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
Coa Availability — Verified Source
Testing Lab Disclosure — Claimed

Violation History

2 incidents
Prop 65 Lead2018-04-13Source
Fda Warning Making drug claims for dietary supplements, suggesting they can treat, mitigate, or prevent diseases such as breast cancer and Alzheimer's.2017-02-01Source
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Frequently Asked Questions
Is Life Extension Extend-Release Magnesium, 60 Vegetarian Capsules (250 mg per Capsule) a good supplement?

Life Extension Extend-Release Magnesium, 60 Vegetarian Capsules (250 mg per Capsule) 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 Of the 8 inactive ingredients, 7 are rated safe and 0 are flagged for review. The manufacturer, Life Extension, holds a brand trust score of 86/100 with 3 verified certifications including Consumerlab, Fda Gmp Inspections, Nsf Gmp.

What are the ingredients in Life Extension Extend-Release Magnesium, 60 Vegetarian Capsules (250 mg per Capsule)?

Life Extension Extend-Release Magnesium, 60 Vegetarian Capsules (250 mg per Capsule) contains 1 active ingredients: Magnesium (as ZumXR®magnesium oxide, magnesium citrate) (250 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Life Extension Extend-Release Magnesium, 60 Vegetarian Capsules (250 mg per Capsule) safe to take?

Life Extension Extend-Release Magnesium, 60 Vegetarian Capsules (250 mg per Capsule) 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 Life Extension a trustworthy supplement brand?

Life Extension receives a brand trust score of 86/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1980 and headquartered in Fort Lauderdale, Florida, USA, the company offers 352 products in their lineup. They hold 3 verified certifications including Consumerlab, Fda Gmp Inspections, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Life Extension 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.