Nature's Blend Okinawa Coral Calcium 1000 mg supplement bottle
Nature's Blend

Okinawa Coral Calcium 1000 mg

What We Researched
3 active ingredients analyzed · 10 inactive ingredients decoded · 2 brand certifications checked · 2 retailers compared · Last updated: Mar 2026
66
Product Score Fair
75
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin D3 (as Cholecalciferol) 5 mcg 25%
Calcium 370 mg 28%
Magnesium (as Coral Calcium, Magnesium Oxide) 100 mg 24%
Bioavailability Good

Absorption Rating

  • Vitamin D3 (as Cholecalciferol) Good
  • Calcium Good
  • Magnesium (as Coral Calcium, Magnesium Oxide) Poor
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Gelatin
  • Magnesium Stearate
  • Stearic Acid
  • Silicon Dioxide
  • Starch
  • Acacia Gum
  • Medium Chain Triglyceride
  • Calcium Phosphate
  • DL-Alpha-Tocopherol
Efficacy Very Poor

Dosage Analysis

  • Vitamin D3 (as Cholecalciferol) 5 mcg Under-dosed
  • Calcium 370 mg Under-dosed
  • Magnesium (as Coral Calcium, Magnesium Oxide) 100 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin D3 (as Cholecalciferol) 5 mcg 25%
Calcium 370 mg 28%
Magnesium (as Coral Calcium, Magnesium Oxide) 100 mg 24%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Gelatin Safe

Forms the capsule shell that holds the supplement contents.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Starch Generally_safe

It is used as a filler, binder, or thickener.

Acacia Gum Safe

Binds tablet ingredients together. Also a source of soluble fiber.

Medium Chain Triglyceride Unknown
Calcium Phosphate Generally_safe

It is used as a filler and anticaking agent in supplements.

DL-Alpha-Tocopherol Unknown

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$13$12$11$10$9 $10.78
Target

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 Blend

Founded 1974 · Casa Grande, Arizona, USA · 156 products · naturesblendshop.com/

Certifications

2 certifications
Npa Gmp Verified Source
Fda Gmp Inspections Verified Source

Transparency

4 claims
Third Party Testing Claim — Claimed Source
Coa Availability — Verified Source
In House Testing — Verified Source

Violation History

1 incident
Prop 65 Lead2019-02-08Source
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Frequently Asked Questions
Is Nature's Blend Okinawa Coral Calcium 1000 mg a good supplement?

Nature's Blend Okinawa Coral Calcium 1000 mg received a product quality score of 66/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 3 active ingredients with 30 servings per container. Of the 10 inactive ingredients, 6 are rated safe and 0 are flagged for review. The manufacturer, Nature's Blend, holds a brand trust score of 75/100 with 2 verified certifications including Npa Gmp, Fda Gmp Inspections.

What are the ingredients in Nature's Blend Okinawa Coral Calcium 1000 mg?

Nature's Blend Okinawa Coral Calcium 1000 mg contains 3 active ingredients: Vitamin D3 (as Cholecalciferol) (5 mcg), Calcium (370 mg), Magnesium (as Coral Calcium, Magnesium Oxide) (100 mg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Blend Okinawa Coral Calcium 1000 mg safe to take?

Nature's Blend Okinawa Coral Calcium 1000 mg 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 Nature's Blend a trustworthy supplement brand?

Nature's Blend receives a brand trust score of 75/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1974 and headquartered in Casa Grande, Arizona, USA, the company offers 156 products in their lineup. They hold 2 verified certifications including Npa Gmp, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature's Blend has 1 historical regulatory incident 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.