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Stronger Bones

Garden of Life Dr. Formulated
4.6
★ ★ ★ ★ ★
(117 ratings)
Vitamin K 90 mcg
Calcium 1300 mg
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Score75
The strongest feature is provides vitamin D3; the main drawback is very high calcium serving.
How scoring works
Quantity:150 Tablet(s) • (30 servings)
Goals:
Bone Health
Heart Health

Score 75

The strongest feature is provides vitamin D3; the main drawback is very high calcium serving.
How scoring works
$23.09($0.76 per serving)
iHerb
$ 23.09
Pure Formulas
$ 24.49
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Analysis

Eggshell calcium, vitamin D3, vitamin K1, and MK-7 create a simple formula focused on bone mineral support. The core ingredients address related nutritional pathways rather than relying on a single mineral.

The 1,300 mg calcium amount is very large for one serving, magnesium is absent, and five tablets are required each day. These issues matter for daily use, label interpretation, and comparison with simpler formulas.

It may fit adults with a specifically identified high calcium need who receive magnesium elsewhere. The most important trade-off is very high calcium serving.

Who is it for
  • adults with a specifically identified high calcium need who receive magnesium elsewhere
  • Adults comparing bone or general nutrient formulas by dose and form
Best for
  • High-dose calcium with D3 and vitamin K
  • Simple bone-support supplementation

Pros

  • Provides vitamin D3
  • Includes vitamin K1 and MK-7
  • Simple ingredient list
  • Uses eggshell calcium

Cons

  • Very high calcium serving
  • No magnesium
  • Five tablets per serving
  • Only 30 servings

Warnings

  • Vitamin K can interfere with warfarin dosing and should remain consistent under prescriber guidance.
  • Calcium at 1,300 mg in one serving may cause constipation and is better divided when appropriate; people with a history of calcium kidney stones should review suitability with their clinician.
  • Contains eggshell-derived calcium and may not suit people with egg allergy.

Nutrient quality

79 High impact

The focused nutrient set aligns closely with bone support. A high calcium load and modest K2 amount limit balance.

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Ingredient transparency

79 High impact

Core active amounts are mostly clear and easy to evaluate. Missing non-active ingredients and complete use directions leave meaningful label gaps.

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Customer satisfaction

61 Moderate impact

Aggregate satisfaction data are favorable. Specific firsthand comments were not supplied, leaving repeated complaints and purpose fit uncertain.

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Value for money

78 High impact

The core actives provide fair value for the category. Serving economics and formulation trade-offs keep it from standing out.

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Report analysis

Goals

Bone Health
Bone Health
Impact
High effect
A Goal FitC Strength of SupportB- CoverageA Formula Quality
Vitamin K · 20 mcgCalcium · 1300 mgVitamin D · 20 mcg

Calcium, vitamin D3, vitamin K1, and MK-7 create a coherent bone-mineralization formula. Vitamin D supports calcium absorption, while vitamin K supports calcium-binding proteins.

The calcium amount is too large for efficient absorption at one time, and the MK-7 amount is below a strong maintenance target. Dividing the tablet serving may improve calcium use, but the low K2 amount still limits mineral-direction support.

Study evidence
Calcium Supportive 144 studies
Vitamin D Supportive 202 studies
Vitamin K Supportive 78 studies
Heart Health
Heart Health
Impact
Moderate effect
B- Goal FitD Strength of SupportD+ CoverageC+ Formula Quality
Vitamin K · 20 mcgVitamin D · 20 mcg

Vitamin D3 and MK-7 have complementary calcium-management roles, but the 20 mcg MK-7 amount is too small for strong arterial support. A large eggshell-calcium serving and five tablets keep the product centered on bone health.

The formula lacks lipid delivery and does not address lipids, nitric oxide, or cardiac energy. Even the low vitamin K2 amount can complicate warfarin management, so users of vitamin K antagonists need prescriber guidance.

Study evidence
Vitamin D Mixed 164 studies
Vitamin K Mixed 62 studies

Ingredients

IngredientAmount per serving
Vitamin D (Cholecalciferol)
 20 mcg
Vitamin K (Phylloquinone)
 90 mcg
Calcium (Eggshell Calcium)
 1300 mg
Vitamin K2 (Menaquinone-7)
 20 mcg
Gluten Free Adults 18–50 Kosher Dairy Free Organic Vegetarian
Report overview
Vitamin K (Phylloquinone) · 90 mcg OverallScore51
C+ Active Ingredient Quality & BioavailabilityD+ Dose, Safety & Label TransparencyF Value

The formula uses the preferred MK-7 form, but its 20 mcg amount is too low for the collection target. A dry five-tablet serving provides no stated fat-based absorption support and depends mainly on K1 for its vitamin K content. Added vitamin D3 supports the bone-focused formula, yet the high serving cost and underdosed MK-7 weaken its value.

View ingredientView products
Calcium (Eggshell Calcium) · 1300 mg OverallScore48
C+ Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyF Value

Eggshell calcium provides a substantial mineral amount, with vitamin D and two forms of vitamin K adding relevant bone-support cofactors. The full serving delivers more calcium than is typically absorbed efficiently at one time, so divided intake may make better use of the dose. Its higher serving cost also limits value despite the added cofactors.

View ingredientView products
Loading alternative details
89 Performance

Mega D-3 5000 IU & MK-7 180 mcg

NOW
<p>It combines 125 mcg of vitamin D3 with 180 mcg of K2. The ingredient form or amount gives stronger focused coverage of calcium or the vitamin D-and-K pairing than the original. Because it covers only part of the original formula, another product may be needed for the omitted bone-support nutrients.</p>
83 Performance

Albion Chelated Calcium 180 mg

Swanson Ultra
<p>It supplies 360 mg of calcium as a glycinate chelate plus 2.5 mcg of vitamin D. The ingredient form or amount gives stronger focused coverage of calcium or the vitamin D-and-K pairing than the original. Because it covers only part of the original formula, another product may be needed for the omitted bone-support nutrients.</p>
87 Performance

Vitamin D3 25 mcg (1000 IU) & K2 120 mcg

Natural Factors
<p>It combines 25 mcg of vitamin D3 with 120 mcg of K2 as menaquinone-7. The ingredient form or amount gives stronger focused coverage of calcium or the vitamin D-and-K pairing than the original. Because it covers only part of the original formula, another product may be needed for the omitted bone-support nutrients.</p>
84 Budget

600 Calcium Supplement

21st Century
<p>It supplies 600 mg of calcium carbonate. It is much less expensive per serving and directly covers either calcium or K2. It is not a complete replacement for the original’s combined calcium, vitamin D, vitamin K, and other supporting ingredients.</p>
84 Budget

Calcium 600 with Vitamin D3

Nature's Bounty
<p>It combines 600 mg of calcium carbonate with 20 mcg of vitamin D3. It is much less expensive per serving and directly covers either calcium or K2. It is not a complete replacement for the original’s combined calcium, vitamin D, vitamin K, and other supporting ingredients.</p>
88 Budget

Vitamin K2 MK-7 100 mcg

Nutricost
<p>It supplies 100 mcg of vitamin K2 as menaquinone-7. It is much less expensive per serving and directly covers either calcium or K2. It is not a complete replacement for the original’s combined calcium, vitamin D, vitamin K, and other supporting ingredients.</p>
84 Value

Calcium Citrate +D3 Petites

21st Century
<p>It combines 400 mg of calcium citrate with 12.5 mcg of vitamin D3. It offers concentrated calcium or K2 coverage at a much lower ongoing cost. Compared with the original, the value is focused on one main collection rather than a complete multi-ingredient bone formula.</p>
86 Value

Natural Vitamin K2 MK-7 with MenaQ7 100 mcg

Doctor's Best
<p>It supplies 100 mcg of vitamin K2 as MenaQ7 menaquinone. It offers concentrated calcium or K2 coverage at a much lower ongoing cost. Compared with the original, the value is focused on one main collection rather than a complete multi-ingredient bone formula.</p>
82 Value

Calcium Citrate

Nature's Way
<p>It supplies 500 mg of calcium from carbonate, citrate, and malate. It offers concentrated calcium or K2 coverage at a much lower ongoing cost. Compared with the original, the value is focused on one main collection rather than a complete multi-ingredient bone formula.</p>
Report alternatives

Sources

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

  1. Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women.
    Knapen MH; Drummen NE; Smit E; Vermeer C; Theuwissen E · 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 trial244 participantsBone Health forVitamin K
  2. Does vitamin K2 play a role in the prevention and treatment of osteoporosis for postmenopausal women: a meta-analysis of randomized controlled trials.
    Huang ZB; Wan SL; Lu YJ; Ning L; Liu C; Fan SW · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2015
    Meta-analysis6,759 participants19 studies pooledBone Health forVitamin K
  3. Investigating the interrelationship of vitamin K and vitamin D status on bone density: results from the VITamin D and OmegA-3 TriaL.
    Chou SH; Booth SL; Cook NR; Kim E; Kotler G; Fu X; Buring JE; Manson JE; LeBoff MS · JBMR plus · 2026
    Randomized trial771 participantsBone Health forVitamin K
  4. 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
  5. 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
  6. Bone turnover and the response to alendronate treatment in postmenopausal osteoporosis.
    Gonnelli S; Cepollaro C; Pondrelli C; Martini S; Montagnani A; Monaco R; Gennari C · Calcified tissue international · 1999
    Randomized trial100 participantsBone Health forCalcium
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. Pregnancy vitamin D supplementation and offspring bone mineral density in childhood follow-up of a randomized controlled trial.
    Moon RJ; D' Angelo S; Curtis EM; Ward KA; Crozier SR; Schoenmakers I; Javaid MK; Bishop NJ; Godfrey KM; Cooper C; Harvey NC; MAVIDOS Trial Group · The American journal of clinical nutrition · 2024
    Randomized trial454 participantsBone Health forVitamin D
  13. Vitamin D analogs and bone: preclinical and clinical studies with eldecalcitol.
    Matsumoto T; Takano T; Saito H; Takahashi F · BoneKEy reports · 2014
    Narrative reviewBone Health forVitamin D
  14. Efficacy of vitamin D fortified foods on bone mineral density and serum bone biomarkers: A systematic review and meta-analysis of interventional studies.
    Tangestani H; Djafarian K; Emamat H; Arabzadegan N; Shab-Bidar S · Critical reviews in food science and nutrition · 2020
    Meta-analysis1,786 participants20 studies pooledBone Health forVitamin D
  15. Cholecalciferol Supplementation Attenuates Bone Loss in Incident Kidney Transplant Recipients: A Prespecified Secondary Endpoint Analysis of a Randomized Controlled Trial.
    Tsujita M; Doi Y; Obi Y; Hamano T; Tomosugi T; Futamura K; Okada M; Hiramitsu T; Goto N; Isaka Y; Takeda A; Narumi S; Watarai Y · Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2022
    Randomized trial193 participantsBone Health forVitamin D
  16. Vitamin D supplementation and bone health in post-menopausal women: a 24-month randomized controlled intervention with enhanced bioavailability formulations.
    Rasool N; Munir Y · European journal of clinical nutrition · 2026
    Randomized trial612 participantsBone Health forVitamin D
  17. Vitamin K and the prevention of fractures: systematic review and meta-analysis of randomized controlled trials.
    Cockayne S; Adamson J; Lanham-New S; Shearer MJ; Gilbody S; Torgerson DJ · Archives of internal medicine · 2006
    Meta-analysis13 studies pooledBone Health forVitamin K
  18. Effect of combined administration of vitamin D3 and vitamin K2 on bone mineral density of the lumbar spine in postmenopausal women with osteoporosis.
    Iwamoto J; Takeda T; Ichimura S · Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association · 2001
    Randomized trial92 participantsBone Health forVitamin K
  19. Efficacy and safety of vitamin K2 for postmenopausal women with osteoporosis at a long-term follow-up: meta-analysis and systematic review.
    Zhou M; Han S; Zhang W; Wu D · Journal of bone and mineral metabolism · 2022
    Meta-analysis6,853 participants9 studies pooledBone Health forVitamin K
  20. Low-dose vitamin K2 (MK-4) supplementation for 12 months improves bone metabolism and prevents forearm bone loss in postmenopausal Japanese women.
    Koitaya N; Sekiguchi M; Tousen Y; Nishide Y; Morita A; Yamauchi J; Gando Y; Miyachi M; Aoki M; Komatsu M; Watanabe F; Morishita K; Ishimi Y · Journal of bone and mineral metabolism · 2015
    Randomized trial48 participantsBone Health forVitamin K
  21. Vitamin D supplementation for cardiometabolic risk markers in pregnant women based on the gestational diabetes mellitus or obesity status : a randomized clinical trial.
    Yin WJ; Wang P; Ma SS; Tao RX; Hu HL; Jiang XM; Zhang Y; Tao FB; Zhu P · European journal of nutrition · 2024
    Randomized trial1,537 participantsHeart Health forVitamin D
  22. Paricalcitol and endothelial function in chronic kidney disease trial.
    Zoccali C; Curatola G; Panuccio V; Tripepi R; Pizzini P; Versace M; Bolignano D; Cutrupi S; Politi R; Tripepi G; Ghiadoni L; Thadhani R; Mallamaci F · Hypertension (Dallas, Tex. : 1979) · 2015
    Randomized trial88 participantsHeart Health forVitamin D
  23. Vitamin D Supplementation, Serum 25(OH)D Concentrations and Cardiovascular Disease Risk Factors: A Systematic Review and Meta-Analysis.
    Mirhosseini N; Rainsbury J; Kimball SM · Frontiers in cardiovascular medicine · 2020
    Meta-analysis81 studies pooledHeart Health forVitamin D
  24. Does vitamin D supplementation modulate metabolic risk factors of cardiovascular disease? A systematic review and meta-analysis of clinical trials.
    Abumweis S; Alqadi S; Al Tarteer A; Alrefai W; Alzoughool F; Jew S; Qudah T · Asia Pacific journal of clinical nutrition · 2026
    Meta-analysis45 studies pooledHeart Health forVitamin D
  25. Comparative Efficacy of Nutraceuticals on Endothelial Function: A Systematic Review and Network Meta-Analysis.
    Norouzzadeh M; Rashedi MH; Mahdavi-Mazdeh G; Kosari A; Shahinfar H · Current atherosclerosis reports · 2026
    Meta-analysisHeart Health forVitamin D
  26. Vitamin K Intake and Atherosclerotic Cardiovascular Disease in the Danish Diet Cancer and Health Study.
    Bellinge JW; Dalgaard F; Murray K; Connolly E; Blekkenhorst LC; Bondonno CP; Lewis JR; Sim M; Croft KD; Gislason G; Torp-Pedersen C; Tjønneland A; Overvad K; Hodgson JM; Schultz C; Bondonno NP · Journal of the American Heart Association · 2021
    Cohort study53,372 participantsHeart Health forVitamin K
  27. Menaquinone-7 supplementation improves arterial stiffness in healthy postmenopausal women. A double-blind randomised clinical trial.
    Knapen MH; Braam LA; Drummen NE; Bekers O; Hoeks AP; Vermeer C · Thrombosis and haemostasis · 2016
    Randomized trial244 participantsHeart Health forVitamin K
  28. The effect of vitamin K1 on arterial calcification activity in subjects with diabetes mellitus: a post hoc analysis of a double-blind, randomized, placebo-controlled trial.
    Bellinge JW; Francis RJ; Lee SC; Bondonno NP; Sim M; Lewis JR; Watts GF; Schultz CJ · The American journal of clinical nutrition · 2022
    Randomized trial149 participantsHeart Health forVitamin K
  29. Dietary Vitamin K1 Intake and Incident Aortic Valve Stenosis.
    Schultz CJ; Dalgaard F; Bellinge JW; Murray K; Sim M; Connolly E; Blekkenhorst LC; Bondonno CP; Lewis JR; Gislason GH; Tjønneland A; Overvad K; Hodgson JM; Bondonno NP · Arteriosclerosis, thrombosis, and vascular biology · 2024
    Cohort study55,545 participantsHeart Health forVitamin K
  30. Association between vitamin K1 intake and mortality in the Danish Diet, Cancer, and Health cohort.
    Palmer CR; Bellinge JW; Dalgaard F; Sim M; Murray K; Connolly E; Blekkenhorst LC; Bondonno CP; Croft KD; Gislason G; Tjønneland A; Overvad K; Schultz C; Lewis JR; Hodgson JM; Bondonno NP · European journal of epidemiology · 2021
    Cohort study56,048 participantsHeart Health forVitamin K