Product Image

Calcium with Vitamin D3 Powder Unflavored

4.7
★ ★ ★ ★ ★
(136 ratings)
Calcium 1000 mg
Product Image
Score79
A good-value calcium powder with mixed forms and modest vitamin D3. Flexible dosing helps, but the oversized serving and ambiguous calcium entries require careful label checking.
How scoring works
Powder
Quantity:8 Ounce(s) • (75 servings)
Goals:
Bone Health

Score 79

A good-value calcium powder with mixed forms and modest vitamin D3. Flexible dosing helps, but the oversized serving and ambiguous calcium entries require careful label checking.
How scoring works
$22.50($0.30 per serving)
iHerb
$ 22.50
Walmart
$ 25.00
Pure Formulas
$ 33.00
Report prices

Analysis

The powder lists 1,000 mg of calcium from carbonate and citrate sources with 4.4 mcg of vitamin D3. Citrate improves the mixed base, while the vitamin D amount offers only modest absorption support.

A powder can make dose division easier for people who do not want capsules. However, the repeated 1,000 mg entries for both calcium forms make it unclear whether they describe a shared total or separate quantities.

The low serving cost is a clear strength, especially for regular use. Better label clarity and a more meaningful vitamin D amount would make it easier to recommend as a complete bone-focused choice.

Who is it for
  • People who prefer unflavored powder over pills
  • Adults wanting flexible calcium dosing
  • Value-conscious users who can verify the label directions
Best for
  • Mixable calcium supplementation
  • Dividing calcium into smaller doses
  • Long-term serving value

Pros

  • Includes citrate alongside carbonate
  • Powder format supports flexible dosing
  • Provides strong value per serving

Cons

  • Duplicate calcium entries make the total unclear
  • Vitamin D3 amount is modest
  • Lacks vitamin K and magnesium

Warnings

  • Confirm the total elemental calcium on the package because the supplied data lists 1,000 mg under both citrate and carbonate; divide a confirmed 1,000 mg serving when possible.

Nutrient quality

81 Highest impact

The calcium blend and vitamin D3 provide direct, meaningful bone support. Mixed absorption quality and an oversized single calcium serving are the main limitations.

Ingredient transparency

73 High impact

The total active amounts are disclosed without a proprietary blend. Measuring directions, form allocation, and inactive ingredients are incomplete.

Customer satisfaction

66 High impact

The aggregate rating is strong and rests on an adequate evidence base. Specific experience details are absent, so recurring complaints and purpose alignment cannot be assessed.

Value for money

95 Highest impact

A substantial calcium amount at a very favorable serving cost provides excellent value. Mixed forms modestly limit the formula-quality advantage.

Report analysis

Goals

Bone Health
Bone Health
Impact
High effect
A Goal FitB- Strength of SupportD+ CoverageB+ Formula Quality
Calcium · 1000 mgVitamin D · 4.4 mcg

Calcium directly supplies the main structural mineral in bone, and vitamin D3 adds some absorption support. The citrate component improves the mixed-source formula, though carbonate is less flexible when stomach acid is low.

The full calcium serving is larger than is usually absorbed efficiently at once, so dividing it may improve use. Vitamin D3 is present only as a modest cofactor, and no vitamin K or matrix-support ingredient is included.

Study evidence
Calcium Supportive 144 studies

Ingredients

IngredientAmount per serving
Vitamin D3 (Cholecalciferol)
 4.4 mcg
Calcium (Calcium Carbonate, Calcium Citrate)
 1000 mg
Gluten Free Adults 18–50 Dairy Free
Report overview
Calcium (Calcium Carbonate, Calcium Citrate) · 1000 mg OverallScore76
B Active Ingredient Quality & BioavailabilityC Dose, Safety & Label TransparencyA+ Value

Calcium citrate improves the blend, but calcium carbonate makes absorption quality mixed. The 1000 mg serving is larger than the amount usually absorbed most efficiently at once, so dividing it may improve use. The very low cost supports strong value despite the oversized serving.

View ingredientView products
Loading alternative details
88 Performance

Calcium Hydroxyapatite Caps

NOW
Hydroxyapatite supplies a practical calcium amount with naturally paired phosphorus and clear dosing, giving broader bone-mineral support than a basic calcium-only formula. The supplied data omit complete directions and inactive ingredients.
85 Performance

Cal/Mag 500 mg/250 mg

NaturesPlus
Chelated calcium and magnesium provide balanced doses and strong form quality, adding a useful cofactor that many calcium-only products omit. The focused mineral formula does not include vitamin D or vitamin K.
82 Performance

Ultra BoneUp

Jarrow Formulas
Calcium, vitamin D3, magnesium, MK-7, silicon, boron, and cartilage collagen cover more bone-support pathways than a simple calcium product. Magnesium oxide and modest supporting amounts temper the formula, and vitamin K requires consistent intake for people using vitamin K antagonists.
84 Budget

600 Calcium Supplement

21st Century
The supplied serving cost is lower than the original, making it a genuine budget alternative. A straightforward calcium carbonate serving keeps the formula focused and exceptionally economical.
85 Budget

Calcium Carbonate

NOW
The supplied serving cost is lower than the original, making it a genuine budget alternative. The pure powder provides a substantial calcium amount with strong serving value and no unrelated actives.
84 Budget

Calcium 600 with Vitamin D3

Nature's Bounty
The supplied serving cost is lower than the original, making it a genuine budget alternative. Meaningful calcium and vitamin D3 amounts create a focused bone-support option with strong serving value.
88 Value

Calcium Citrate Pure Powder

NOW
A simple powder delivers a substantial, clearly disclosed calcium citrate amount with strong absorption flexibility and serving value. That balance makes it a practical value-focused alternative. Vitamin D, vitamin K, and magnesium are not included.
82 Value

Calcium Citrate

Nature's Way
Citrate and malate improve absorption flexibility while keeping the supplemental amount practical and the serving cost favorable. That balance makes it a practical value-focused alternative. Missing excipient and full-use details reduce transparency.
84 Value

Calcium Citrate +D3 Petites

21st Century
Calcium citrate and vitamin D3 combine useful bone-support ingredients in a practical serving with strong value. That balance makes it a practical value-focused alternative. The supplied data do not include excipient details or complete directions.
Report alternatives

Sources

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

  1. 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
  2. Dietary calcium intake protects women consuming oral contraceptives from spine and hip bone loss.
    Teegarden D; Legowski P; Gunther CW; McCabe GP; Peacock M; Lyle RM · The Journal of clinical endocrinology and metabolism · 2005
    Randomized trial154 participantsBone Health forCalcium
  3. Associations of dietary calcium intake with metabolic syndrome and bone mineral density among the Korean population: KNHANES 2008-2011.
    Kim MK; Chon SJ; Noe EB; Roh YH; Yun BH; Cho S; Choi YS; Lee BS; Seo SK · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2018
    Cross-sectional study14,705 participantsBone Health forCalcium
  4. 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
  5. 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
  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