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Calcium Citrate +D3 Maximum

21st Century
4.8
★ ★ ★ ★ ★
(20857 ratings)
Calcium 630 mg
Product Image
Score98

A premium-absorption calcium citrate and D3 tablet designed for maximum tolerance and efficacy.

How scoring works
scaleQuantity:75 Tablet(s) • (37 servings)
track_changesGoals:
accessibility_new Bone Health

leaderboard Score 98

A premium-absorption calcium citrate and D3 tablet designed for maximum tolerance and efficacy.

How scoring works
Also available as 2 options
400mg • 200 Tablet(s) servings Calcium 400 mg • 200 Tablet(s) • 100 servings $10.99 ($0.10 per serving) 120 servings Calcium 630 mg • 120 Tablet(s) • 60 servings $6.99 ($0.11 per serving)
$6.49($0.17 per serving)
iHerb
$ 6.49
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psychologyAnalysis

Calcium citrate is widely considered the better-absorbed form compared to carbonate, especially as we age and stomach acid naturally decreases. This formula includes 630mg of citrate along with vitamin D3 to maximize mineral transport.

Because it is a citrate-based supplement, it is much less likely to cause the gas and constipation often associated with cheaper bone health products. It is a thoughtful formulation for maintaining skeletal integrity efficiently.

thumb_upPros
  • Highly bioavailable citrate form
  • Gentle on the stomach
  • Includes vitamin D3
  • No food required for absorption
thumb_downCons
  • Lacks magnesium
  • Tablet size is somewhat large
  • Requires two tablets for full dose
warningWarnings
  • Take with plenty of water
  • Keep in a cool, dry place
scienceNutrient quality
97 Highest impact

Superior bioavailability of the citrate form ensures efficient mineral utilization and gastrointestinal comfort. Synergistic inclusion of vitamin D supports essential pathways for calcium transport.

scienceIngredient transparency
99 Highest impact

All active ingredients and their respective milligram yields are clearly disclosed on the labeling. Consumer transparency is supported by clear intake instructions and disclosure of all formula components.

thumb_upCustomer satisfaction
98 Highest impact

Exceptional average ratings across a massive user base indicate superior product quality. Feedback confirms the citrate form is effective and well-tolerated for long-term mineral support.

workspace_premiumValue for money
99 Highest impact

Pricing is very competitive for a high-quality mineral and vitamin supplement using the citrate form. Exceptional value is provided by the combination of high bioavailability and affordable cost.

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track_changesGoals
Bone Health
accessibility_newBone Health
Impact
Highest effect
A Goal FitA Strength of SupportC CoverageA Formula Quality
Vitamin D · 13 mcgCalcium · 630 mg

Calcium citrate provides a highly bioavailable structural mineral to maintain bone mineral density and skeletal strength. Vitamin D3 is included to ensure efficient intestinal absorption and mineral transport to the bone matrix.

This selection is superior to standard carbonate forms due to its high solubility and lack of requirement for stomach acid. However, the formula lacks foundational magnesium and signaling cofactors like vitamin K2, which are necessary for full skeletal synergy.

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scienceIngredients
IngredientAmount per serving
Vitamin D3
13 mcg
Calcium
630 mg
grain_off Gluten Free person Adults 18–50
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CalciumstarsOverallScore74
A- Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyA+ Value
accessibility_new
These calcium citrate tablets provide a high-bioavailability mineral source for those seeking the best possible skeletal absorption. The formula is designed to be gentle on the digestive system while providing a robust daily dose.
scienceView ingredientinventory_2View products
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Calcium Citrate Magnesium and Zinc

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Calcium Citrate Caps

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TriCalcium Complex with D & K

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Albion Chelated Calcium 180 mg

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Other sellers (4)
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