How does DoseRank decide what ranks #1?

Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.

Is a higher dose always better?

No. Dose-fit rewards landing inside the range studied for the outcome — over-dosing (common with melatonin) or under-dosing both lower the score. The goal is the effective dose, not the biggest number.

What does the Value score mean?

The Value score compares a product's price per serving with clinically relevant products ranked for the same outcome. A score of 50 is the typical price; above 50 means better value than typical, while below 50 means the product costs more than typical. It is a 0–100 value signal, not a percentile.

Why is the cheapest product not #1?

Cost is only one input. The cheapest pick here is a citrate form with weaker absorption and a stock-risk flag, so it leads on Value-for-cost but trails on the composite that also weighs evidence, dose fit and availability.

Are these affiliate links?

Retailer links may be affiliate links and DoseRank may earn a commission. Rankings and placement are determined by the scoring model only — never by payment from a brand.

Is this medical advice?

No. DoseRank summarizes evidence to help you choose; it is not a substitute for a clinician, especially if you are pregnant, breastfeeding, on medication, or managing a health condition.

DOSERANKEVIDENCE-BASED SUPPLEMENTS

Increase bone density

DOSERANKEVIDENCE-BASED SUPPLEMENTS

Best Supplements for Bone mineral density — 7127 Ranked | DOSERANK

Top decision cards

Best products for bone mineral density

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for bone mineral density

21st Century, Calcium Plus D3, 90 Tablets

21st Century$0.07 / serving4.7 · 11,015Available now

Also helps with

Fracture risk

Gastroesophageal reflux or heartburn

Calcium status

Why this ranks here

Evidence fitVitamin D3 (Cholecalciferol) and Calcium Carbonate are the strongest evidence signals for this outcome.
Dose fitCalcium Carbonate at 1000 mg lands inside the studied 500-1200 mg window.
Price / serving$0.07 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustStrong trust signals — consistently high marks from verified buyer ratings.

The numbers

20 mcg

1000 mgIn rangeinside the studied 500-1200 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

21st Century, 600+D3, Calcium & Vitamin D3 Supplement, 400 Tablets

21st CenturyClinical94Dose fit57Popularity84$0.03/ serving

21st Century, Calcium Magnesium Zinc + D3, 250 Tablets

21st CenturyClinical94Dose fit66Popularity99$0.13/ serving

Nature's Bounty, Calcium Magnesium Zinc with Vitamin D3, 100 Coated Caplets

Nature's BountyClinical93Dose fit55Popularity99$0.16/ serving

21st Century, 600+D3 Plus Minerals, 120 Tablets

21st CenturyClinical94Dose fit57Popularity68$0.04/ serving

21st Century, Liquid Filled Calcium Plus D3, 90 Rapid Release Softgels

21st CenturyClinical94Dose fit70Popularity84$0.21/ serving

21st Century, Calcium 500 + D3, 400 Tablets

21st CenturyClinical93Dose fit55Popularity50$0.03/ serving

NOW Foods, Calcium & Magnesium With Vitamin D-3 and Zinc, 240 Softgels

NOW FoodsClinical93Dose fit55Popularity91$0.24/ serving

Nature's Bounty, Calcium Plus Vitamin D3, 120 Softgels

Nature's BountyClinical94Dose fit70Popularity68$0.22/ serving

Nature Made, Calcium with Vitamin D3, 100 Softgels

Nature MadeClinical94Dose fit57Popularity76$0.15/ serving

Top decision cards

Best products for bone mineral density

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for bone mineral density

21st Century, Calcium Plus D3, 90 Tablets

21st Century$0.07 / serving4.7 · 11,015Available now

Also helps with

Fracture risk

Gastroesophageal reflux or heartburn

Calcium status

Why this ranks here

Evidence fitVitamin D3 (Cholecalciferol) and Calcium Carbonate are the strongest evidence signals for this outcome.
Dose fitCalcium Carbonate at 1000 mg lands inside the studied 500-1200 mg window.
Price / serving$0.07 per serving — low price tier for this outcome.
AvailabilityIn stock across major retailers; 99% availability confidence.
TrustStrong trust signals — consistently high marks from verified buyer ratings.

The numbers

20 mcg

1000 mgIn rangeinside the studied 500-1200 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

21st Century, 600+D3, Calcium & Vitamin D3 Supplement, 400 Tablets

21st CenturyClinical94Dose fit57Popularity84$0.03/ serving

21st Century, Calcium Magnesium Zinc + D3, 250 Tablets

21st CenturyClinical94Dose fit66Popularity99$0.13/ serving

Nature's Bounty, Calcium Magnesium Zinc with Vitamin D3, 100 Coated Caplets

Nature's BountyClinical93Dose fit55Popularity99$0.16/ serving

21st Century, 600+D3 Plus Minerals, 120 Tablets

21st CenturyClinical94Dose fit57Popularity68$0.04/ serving

21st Century, Liquid Filled Calcium Plus D3, 90 Rapid Release Softgels

21st CenturyClinical94Dose fit70Popularity84$0.21/ serving

21st Century, Calcium 500 + D3, 400 Tablets

21st CenturyClinical93Dose fit55Popularity50$0.03/ serving

NOW Foods, Calcium & Magnesium With Vitamin D-3 and Zinc, 240 Softgels

NOW FoodsClinical93Dose fit55Popularity91$0.24/ serving

Nature's Bounty, Calcium Plus Vitamin D3, 120 Softgels

Nature's BountyClinical94Dose fit70Popularity68$0.22/ serving

Nature Made, Calcium with Vitamin D3, 100 Softgels

Nature MadeClinical94Dose fit57Popularity76$0.15/ serving

Increase bone density

Increase bone density

Which ingredient types matter for bone mineral densityOpen to see which ingredient types matter for bone mineral density

Minerals & Trace Elements

Vitamins

Structural & Connective Tissue Compounds

Best products for bone mineral density

21st Century, Calcium Plus D3, 90 Tablets

21st Century, 600+D3, Calcium & Vitamin D3 Supplement, 400 Tablets

21st Century, Calcium Magnesium Zinc + D3, 250 Tablets

Nature's Bounty, Calcium Magnesium Zinc with Vitamin D3, 100 Coated Caplets

21st Century, 600+D3 Plus Minerals, 120 Tablets

21st Century, Liquid Filled Calcium Plus D3, 90 Rapid Release Softgels

21st Century, Calcium 500 + D3, 400 Tablets

NOW Foods, Calcium & Magnesium With Vitamin D-3 and Zinc, 240 Softgels

Nature's Bounty, Calcium Plus Vitamin D3, 120 Softgels

Nature Made, Calcium with Vitamin D3, 100 Softgels

What every metric means

Compare the top 3, side by side

Not sure which is right for you?

Get a personal report

Frequently asked

Compare the top 3, side by side

Best products for bone mineral density

21st Century, Calcium Plus D3, 90 Tablets

21st Century, 600+D3, Calcium & Vitamin D3 Supplement, 400 Tablets

21st Century, Calcium Magnesium Zinc + D3, 250 Tablets

Nature's Bounty, Calcium Magnesium Zinc with Vitamin D3, 100 Coated Caplets

21st Century, 600+D3 Plus Minerals, 120 Tablets

21st Century, Liquid Filled Calcium Plus D3, 90 Rapid Release Softgels

21st Century, Calcium 500 + D3, 400 Tablets

NOW Foods, Calcium & Magnesium With Vitamin D-3 and Zinc, 240 Softgels

Nature's Bounty, Calcium Plus Vitamin D3, 120 Softgels

Nature Made, Calcium with Vitamin D3, 100 Softgels

Which ingredient types matter for bone mineral densityOpen to see which ingredient types matter for bone mineral density

Minerals & Trace Elements

Vitamins

Structural & Connective Tissue Compounds

Increase bone density

Increase bone density

Which ingredient types matter for bone mineral densityOpen to see which ingredient types matter for bone mineral density

Minerals & Trace Elements

Vitamins

Structural & Connective Tissue Compounds

Best products for bone mineral density

21st Century, Calcium Plus D3, 90 Tablets

21st Century, 600+D3, Calcium & Vitamin D3 Supplement, 400 Tablets

21st Century, Calcium Magnesium Zinc + D3, 250 Tablets

Nature's Bounty, Calcium Magnesium Zinc with Vitamin D3, 100 Coated Caplets

21st Century, 600+D3 Plus Minerals, 120 Tablets

21st Century, Liquid Filled Calcium Plus D3, 90 Rapid Release Softgels

21st Century, Calcium 500 + D3, 400 Tablets

NOW Foods, Calcium & Magnesium With Vitamin D-3 and Zinc, 240 Softgels

Nature's Bounty, Calcium Plus Vitamin D3, 120 Softgels

Nature Made, Calcium with Vitamin D3, 100 Softgels

What every metric means

Compare the top 3, side by side

Not sure which is right for you?

Get a personal report

Frequently asked

Related outcomes

Related outcomes

Compare the top 3, side by side

Best products for bone mineral density

21st Century, Calcium Plus D3, 90 Tablets

21st Century, 600+D3, Calcium & Vitamin D3 Supplement, 400 Tablets

21st Century, Calcium Magnesium Zinc + D3, 250 Tablets

Nature's Bounty, Calcium Magnesium Zinc with Vitamin D3, 100 Coated Caplets

21st Century, 600+D3 Plus Minerals, 120 Tablets

21st Century, Liquid Filled Calcium Plus D3, 90 Rapid Release Softgels

21st Century, Calcium 500 + D3, 400 Tablets

NOW Foods, Calcium & Magnesium With Vitamin D-3 and Zinc, 240 Softgels

Nature's Bounty, Calcium Plus Vitamin D3, 120 Softgels

Nature Made, Calcium with Vitamin D3, 100 Softgels

Which ingredient types matter for bone mineral densityOpen to see which ingredient types matter for bone mineral density

Minerals & Trace Elements

Vitamins

Structural & Connective Tissue Compounds