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Calcium Carbonate 650 mg Unflavored

Nutricost
4.8
★ ★ ★ ★ ★
(197 ratings)
Calcium 650 mg
Product Image
Score90

A pure, high-concentration calcium carbonate powder for customizable and affordable mineral support.

How scoring works
Quantity:17 Liquid(s) • (286 servings)
Goals:
Bone Health

Score 90

A pure, high-concentration calcium carbonate powder for customizable and affordable mineral support.

How scoring works
$13.95($0.04 per serving)
iHerb
$ 13.95
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Analysis

Because this is a pure powder, there are no binders, fillers, or capsules to deal with. This makes it an excellent choice for someone who wants to mix their minerals into a smoothie or drink for easy consumption.

Calcium carbonate is a very 'dense' form of the mineral, providing 650mg in a small amount. However, it requires stomach acid and the presence of vitamin D3 to be truly effective for bone health.

Pros

  • Extremely cost-effective
  • No pills to swallow
  • Pure and additive-free
  • Flexible dosing

Cons

  • Lacks all cofactors (D, Mg, K)
  • Carbonate form requires a full meal
  • Can have a chalky texture

Warnings

  • Mix thoroughly in liquid
  • Do not consume on an empty stomach

Nutrient quality

80 High impact

Calcium carbonate is an economical source of the mineral, although it has lower solubility than organic salts. The 650mg dose is moderately high and may be better utilized if split into smaller portions.

Ingredient transparency

96 Highest impact

High transparency is maintained through a simple single-ingredient profile. Clear dosage instructions help consumers measure the appropriate amount for their nutritional needs.

Customer satisfaction

85 Highest impact

User ratings are strong, suggesting that the pure powder format is well-received by those seeking simplicity. Review volume is moderate, providing a consistent indicator of satisfaction for this basic mineral source.

Value for money

96 Highest impact

Exceptional value is provided through a very low cost per serving for a large quantity of elemental calcium. The simple format avoids the costs associated with specialized delivery systems or cofactors.

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Goals

Bone Health
Impact
High effect
B- Goal FitB+ Strength of SupportF CoverageC Formula Quality

This single-mineral powder provides a significant dose of calcium carbonate to support the hard structural matrix of bone. Calcium is the most abundant mineral in the body and is foundational for skeletal rigidity and strength.

The use of calcium carbonate is a basic mineral form with lower bioavailability than citrate or chelated forms. This product lacks all other essential bone health cofactors, including magnesium and signaling vitamins D and K, which are required for complete skeletal support.

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Ingredients

IngredientAmount per serving
Calcium (Calcium Carbonate)
 650 mg
Gluten Free Adults 18–50
Report overview
Calcium (Calcium Carbonate) · 650 mg OverallScore72
C+ Active Ingredient Quality & BioavailabilityC Dose, Safety & Label TransparencyA+ Value
This pure calcium carbonate powder is a simple and extremely cost-effective option. While the form is basic, the dose is moderately high and the formula is free from unnecessary fillers.
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