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Calcium Citrate +D3 Petites

21st Century
4.8
★ ★ ★ ★ ★
(1340 ratings)
Calcium 400 mg
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Score84
A practical smaller-tablet calcium citrate and D3 formula with well-sized dosing and limited pathway breadth.
How scoring works
Quantity:200 Tablet(s) • (100 servings)
Goals:

Score 84

A practical smaller-tablet calcium citrate and D3 formula with well-sized dosing and limited pathway breadth.
How scoring works

Also available as

2 options
630mg • 120 Tablet(s) servings Calcium 630 mg • 120 Tablet(s) • 60 servings $8.49 ($0.14 per serving) 630mg • 75 Tablet(s) servings Calcium 630 mg • 75 Tablet(s) • 37 servings $6.49 ($0.17 per serving)
$10.99($0.10 per serving)
iHerb
$ 10.99
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Analysis

The 400 mg calcium amount is well suited to efficient single-dose use, and citrate works across a range of stomach-acid levels. Vitamin D3 adds an appropriate absorption cofactor.

The petite-tablet positioning may help users who struggle with large calcium tablets, though the serving still requires two tablets. No unnecessary active ingredients distract from the main purpose.

No explicit goal was supplied, but the formula is clearly aligned with calcium and bone-mineral intake. Broader bone support remains incomplete without magnesium, vitamin K, or protein-matrix nutrients.

Who is it for
  • Adults who prefer smaller tablets
  • Users seeking calcium citrate
  • People filling a moderate calcium gap
Best for
  • Calcium supplementation
  • Bone mineral intake
  • Vitamin D-supported calcium use

Pros

  • Uses calcium citrate
  • Efficient 400 mg serving
  • Includes vitamin D3
  • Smaller tablet format

Cons

  • Requires two tablets per serving
  • No magnesium
  • No vitamin K
  • No stated product goal was supplied

Warnings

  • Calcium can interfere with levothyroxine, bisphosphonates, tetracycline antibiotics, and quinolone antibiotics; separate doses as directed.
  • People with high blood calcium or recurrent calcium-containing kidney stones should review total calcium intake before use.

Nutrient quality

94 Highest impact

Calcium citrate is a well-absorbed form that does not depend heavily on stomach acid. The 400 mg elemental calcium amount is meaningful for supplementation.

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Ingredient transparency

81 Highest impact

Active ingredients generally have stated amounts and no proprietary blend hides the doses. Missing other ingredients and complete intake directions leave important label details unresolved.

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Customer satisfaction

65 Moderate impact

The supplied average rating is strong and the rating volume provides a useful aggregate signal. No comment-level evidence is provided to assess recurring complaints or confirm how experience matches the intended purpose.

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Value for money

94 Highest impact

The active amount and formula quality support favorable serving value. The supplied formula is not inflated by obvious low-value extras.

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Ingredients

IngredientAmount per serving
Vitamin D3 (Cholecalciferol)
 12.5 mcg
Calcium (Calcium Citrate)
 400 mg
Gluten Free Adults 18–50
Report overview
Calcium (Calcium Citrate) · 400 mg OverallScore94
A- Active Ingredient Quality & BioavailabilityA+ Dose, Safety & Label TransparencyA+ Value

Calcium citrate offers reliable absorption and clearly provides 400 mg of elemental calcium. The serving amount is well matched to the body's typical absorption capacity, with vitamin D3 as a useful cofactor. Its low serving cost makes it an efficient calcium option.

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88 Performance

Calcium Hydroxyapatite Caps

NOW
<p>Hydroxyapatite supplies a practical calcium amount with naturally paired phosphorus and clear dosing. It preserves a well-absorbed calcium approach while improving either serving flexibility or practical value over the original.</p>
85 Performance

Cal/Mag 500 mg/250 mg

NaturesPlus
<p>Chelated calcium and magnesium provide a balanced mineral formula with strong form quality. It adds magnesium and other bone cofactors beyond the original citrate-only approach, with some trade-off in formula simplicity.</p>
82 Performance

Ultra BoneUp

Jarrow Formulas
<p>Calcium, vitamin D3, magnesium, MK-7, silicon, boron, and cartilage collagen cover several bone pathways. It adds magnesium and other bone cofactors beyond the original citrate-only approach, with some trade-off in formula simplicity. Magnesium oxide is a weakness, and vitamin K2 needs caution with warfarin-type medicines.</p>
84 Budget

600 Calcium Supplement

21st Century
<p>A straightforward 600 mg calcium carbonate tablet provides a focused serving without unrelated actives. It costs less per serving, though carbonate is less flexible than the original citrate and works best with food.</p>
85 Budget

Calcium Carbonate

NOW
<p>A pure calcium carbonate powder supplies a substantial dose with simple active disclosure. It costs less per serving, though carbonate is less flexible than the original citrate and works best with food.</p>
84 Budget

Calcium 600 with Vitamin D3

Nature's Bounty
<p>Calcium carbonate and vitamin D3 provide a direct bone-support pairing in a focused formula. It costs less per serving, though carbonate is less flexible than the original citrate and works best with food.</p>
88 Value

Calcium Citrate Pure Powder

NOW
<p>Calcium citrate powder provides a substantial, well-absorbed dose with flexible use and strong serving value. It preserves a well-absorbed calcium approach while improving either serving flexibility or practical value over the original. It does not include vitamin D, vitamin K, or magnesium.</p>
82 Value

Calcium Citrate

Nature's Way
<p>Citrate and malate improve absorption flexibility within a practical mixed-calcium serving at strong value. It preserves a well-absorbed calcium approach while improving either serving flexibility or practical value over the original.</p>
85 Value

600+D3

21st Century
<p>A reasonably sized calcium carbonate serving with vitamin D3 provides focused bone support at very low routine cost. It improves cost or cofactor coverage, though carbonate is less flexible than the original citrate and works best with food. Calcium should be separated from levothyroxine and tetracycline or quinolone antibiotics.</p>
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