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Calcium Citrate & Vitamin D3

4.6
★ ★ ★ ★ ★
(872 ratings)
Calcium 1000 mg
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Score79
A good calcium citrate and vitamin D3 formula with a large full serving. Divided use improves its practicality.
How scoring works
Tablet
Quantity:180 Tablet(s) • (45 servings)
Goals:
Bone Health

Score 79

A good calcium citrate and vitamin D3 formula with a large full serving. Divided use improves its practicality.
How scoring works
$23.16($0.51 per serving)
iHerb
$ 23.16
Vitacost
$ 23.16
Daily Vita
$ 23.16
Amazon
$ 23.16
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Analysis

The citrate form offers dependable absorption across a range of stomach-acid levels. Vitamin D3 adds a meaningful cofactor for calcium uptake and use.

The full calcium amount is substantial enough that divided intake may work better than taking it at once. Four tablets per serving may make that split easier, though it also increases pill burden.

Magnesium, vitamin K, and collagen support are absent. The formula fits users who want focused calcium plus vitamin D and can cover other skeletal needs elsewhere.

Who is it for
  • Adults wanting calcium citrate with vitamin D3
  • Users able to divide tablets across meals
  • People whose diets cover other bone cofactors
Best for
  • Calcium and vitamin D intake
  • Bone-mineral support
  • Divided tablet dosing

Pros

  • Uses calcium citrate
  • Includes vitamin D3
  • Clear active amounts

Cons

  • Large full serving
  • Four tablets per serving
  • No magnesium or vitamin K

Warnings

  • Divide the full calcium amount if the directions permit.
  • Keep calcium away from thyroid medicine and certain antibiotics.
  • High total calcium intake may worsen constipation or raise stone risk in susceptible users.

Nutrient quality

88 Highest impact

Strong forms and meaningful amounts create a focused bone-support formula. An aggressive calcium load and large tablet serving reduce flexibility.

Ingredient transparency

82 Highest impact

The core active amounts and forms are exceptionally clear. The complete usage directions and non-active ingredients are missing.

Customer satisfaction

69 High impact

The aggregate rating is favorable and backed by a substantial review volume. No specific comments are available to assess recurring problems or real-world fit.

Value for money

72 High impact

High-quality forms provide real formula value. The premium cost and four-tablet serving reduce efficiency.

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Goals

Bone Health
Impact
Highest effect
A- Goal FitB+ Strength of SupportC CoverageA Formula Quality
Calcium · 1000 mgVitamin D · 20 mcg

Calcium citrate and vitamin D3 directly support mineral supply and calcium absorption. The citrate form is favorable and both ingredients are clearly disclosed.

The calcium amount is substantial but may absorb better when divided across meals. Missing magnesium, vitamin K, and collagen limit broader skeletal coverage.

Study evidence
Calcium Supportive 144 studies

Ingredients

IngredientAmount per serving
Vitamin D3 (Cholecalciferol)
20 mcg
Calcium (Calcium Citrate)
1000 mg
Gluten Free Adults 18–50 Kosher Dairy Free Sugar Free
Report overview
A- Active Ingredient Quality & BioavailabilityC Dose, Safety & Label TransparencyD+ Value

Calcium citrate supports reliable absorption, and vitamin D3 adds a relevant bone-health cofactor. The calcium amount and chemical form are clearly disclosed, but the full serving is larger than the preferred amount for one dose. The serving cost is moderately above the collection median.

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Sources

Published studies used for the product analysis and the top-ranked studies for each ingredient and goal.

  1. Calcium supplementation during pregnancy and maternal and offspring bone health: a systematic review and meta-analysis.
    Tihtonen K; Korhonen P; Isojärvi J; Ojala R; Ashorn U; Ashorn P; Tammela O · Annals of the New York Academy of Sciences · 2022
    Meta-analysis1,566 participants7 studies pooledBone Health forCalcium
  2. Calcium supplementation and bone mineral density in postmenopausal women using estrogen replacement therapy.
    Haines CJ; Chung TK; Leung PC; Hsu SY; Leung DH · Bone · 1995
    Randomized trialBone Health forCalcium
  3. Calcium supplementation provides an extended window of opportunity for bone mass accretion after menarche.
    Rozen GS; Rennert G; Dodiuk-Gad RP; Rennert HS; Ish-Shalom N; Diab G; Raz B; Ish-Shalom S · The American journal of clinical nutrition · 2003
    Randomized trial100 participantsBone Health forCalcium
  4. Relationship between bone mineral density changes and risk of fractures among patients receiving calcium with or without vitamin D supplementation: a meta-regression.
    Rabenda V; Bruyère O; Reginster JY · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2011
    Meta-analysis47,365 participants15 studies pooledBone Health forCalcium
  5. Treatment with alendronate plus calcium, alendronate alone, or calcium alone for postmenopausal low bone mineral density.
    Bonnick S; Broy S; Kaiser F; Teutsch C; Rosenberg E; DeLucca P; Melton M · Current medical research and opinion · 2007
    Randomized trial701 participantsBone Health forCalcium
  6. What is the impact of daily oral supplementation of vitamin D3 (cholecalciferol) plus calcium on the incidence of hip fracture in older people? A systematic review and meta-analysis.
    Manoj P; Derwin R; George S · International journal of older people nursing · 2023
    Meta-analysis12,620 participants7 studies pooledBone Health forCalcium
  7. Calcium supplementation prevents seasonal bone loss and changes in biochemical markers of bone turnover in elderly New England women: a randomized placebo-controlled trial.
    Storm D; Eslin R; Porter ES; Musgrave K; Vereault D; Patton C; Kessenich C; Mohan S; Chen T; Holick MF; Rosen CJ · The Journal of clinical endocrinology and metabolism · 1998
    Randomized trial60 participantsBone Health forCalcium
  8. The effects of calcium supplementation (milk powder or tablets) and exercise on bone density in postmenopausal women.
    Prince R; Devine A; Dick I; Criddle A; Kerr D; Kent N; Price R; Randell A · Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 1995
    Randomized trial168 participantsBone Health forCalcium
  9. The efficacy of calcium supplementation alone in elderly Thai women over a 2-year period: a randomized controlled trial.
    Rajatanavin R; Chailurkit L; Saetung S; Thakkinstian A; Nimitphong H · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2014
    Randomized trial404 participantsBone Health forCalcium
  10. Calcium-enriched foods and bone mass growth in prepubertal girls: a randomized, double-blind, placebo-controlled trial.
    Bonjour JP; Carrie AL; Ferrari S; Clavien H; Slosman D; Theintz G; Rizzoli R · The Journal of clinical investigation · 1997
    Randomized trial149 participantsBone Health forCalcium