Nature's Answer Marine Based Magnesium, 90 Vegetarian Capsules supplement bottle
Nature's Answer

Marine Based Magnesium, 90 Vegetarian Capsules

What We Researched
2 active ingredients analyzed · 3 inactive ingredients decoded · 5 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
71
Product Score Fair
78
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Calcium (from Aquamin®Red Algae (from Lithothamnium sp Thallus) and Seawater) 25 mg 2%
Magnesium (from Aquamin®Seawater (Magnesium Hydroxide)) 500 mg 119%
Bioavailability Fair

Absorption Rating

  • Calcium (from Aquamin®Red Algae (from Lithothamnium sp Thallus) and Seawater) Good
  • Magnesium (from Aquamin®Seawater (Magnesium Hydroxide)) Poor
Other Ingredients Excellent

Fillers & Additives

  • Vegetable Cellulose (Capsule)
  • Microcrystalline Cellulose
  • Calcium Silicate
Efficacy Poor

Dosage Analysis

  • Calcium (from Aquamin®Red Algae (from Lithothamnium sp Thallus) and Seawater) 25 mg Under-dosed
  • Magnesium (from Aquamin®Seawater (Magnesium Hydroxide)) 500 mg High

Supplement Facts

Ingredient Amount % Daily Value
Calcium (from Aquamin®Red Algae (from Lithothamnium sp Thallus) and Seawater) 25 mg 2%
Magnesium (from Aquamin®Seawater (Magnesium Hydroxide)) 500 mg 119%

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.

Microcrystalline Cellulose Safe

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

Calcium Silicate Safe

Prevents ingredient clumping during manufacturing.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$19$18$17$16$15 Mar 12 $17.24
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
Nature's Answer

Founded 1972 · Hauppauge, New York, United States · 234 products · naturesanswer.com

Certifications

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

Transparency

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

Violation History

3 incidents
Recall Coral Calcium2021-05-13Source
Fda Warning Product (Coral Calcium) contained cesium chloride, which is considered a new dietary ingredient that has not been shown to be safe. The product was deemed adulterated.2021-05-05Source
Prop 65 Lead2014-08-19Source
Related Supplements
Frequently Asked Questions
Is Nature's Answer Marine Based Magnesium, 90 Vegetarian Capsules a good supplement?

Nature's Answer Marine Based Magnesium, 90 Vegetarian Capsules received a product quality score of 71/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 2 active ingredients with 45 servings per container. All 3 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Nature's Answer, holds a brand trust score of 78/100 with 5 verified certifications including Consumerlab, Fda Gmp Inspections, Non Gmo Project, Nsf Gmp.

What are the ingredients in Nature's Answer Marine Based Magnesium, 90 Vegetarian Capsules?

Nature's Answer Marine Based Magnesium, 90 Vegetarian Capsules contains 2 active ingredients: Calcium (from Aquamin®Red Algae (from Lithothamnium sp Thallus) and Seawater) (25 mg), Magnesium (from Aquamin®Seawater (Magnesium Hydroxide)) (500 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Answer Marine Based Magnesium, 90 Vegetarian Capsules safe to take?

Nature's Answer Marine Based Magnesium, 90 Vegetarian Capsules 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 Nature's Answer a trustworthy supplement brand?

Nature's Answer receives a brand trust score of 78/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1972 and headquartered in Hauppauge, New York, United States, the company offers 234 products in their lineup. They hold 5 verified certifications including Consumerlab, Fda Gmp Inspections, Non Gmo Project, Nsf Gmp. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature's Answer has 3 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.