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.

Reduce fracture risk

What this outcome means

Fracture risk is how likely your bones are to break under a fall or everyday strain, shaped by their density, structure, and strength. On DoseRank it maps to a defined health outcome built from human studies on bone mineral density, FRAX risk scores, and fracture incidence – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Post-menopausal womenHormonal shifts that thin bone faster after menopause.

Prone to fallsOlder adults whose balance makes a break more likely.

Low bone densityA scan flagging osteopenia or osteoporosis as a concern.

Stack buildersAlready taking supplements such as Vitamin D3 (Cholecalciferol) or Calcium Carbonate and want the dose right.

Evidence level

92Strong

Vitamin D3 (Cholecalciferol) and Calcium Carbonate – have strong public evidence. DoseRank looks at both evidence quality and formula fit. A DoseFit Score of 56 means this product's ingredient forms and doses are close to what was used in the studies behind this ranking - DoseRank weights each product ingredient.

Best ingredients

Vitamin D3 (Cholecalciferol) and Calcium Carbonate are the best supported ingredient signals for this outcome.

Dose mismatchDoseFit 56

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Calcium Carbonate 1000 mg vs 1000-1500 mg.

Processed

6.8k

Available

6.8k

Ingredients

Brands

533

Coverage

100%

How to read the scores

What every metric means

Each score is 0–100. Higher is better for every metric below.

CompositeThe overall DoseRank score — a weighted blend of clinical strength, evidence, dose fit, trust and value.Higher is better

ClinicalHow strongly the formula's ingredients and doses match what clinical studies used for this outcome.Higher is better

EvidenceHow much published human research backs the formula's key ingredients for this outcome — both how many studies exist and how strong they are.Higher is better

ValueHow the price per serving compares with similar products for this outcome — 50 is the typical price, higher means better value for your money.Higher is better

TrustHow well customers rate this product, with extra weight given to ratings backed by a large number of reviews.Higher is better

PopularityHow strongly this product sells compared with the other ranked products for this outcome.Higher is better

This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →

Not sure which is right for you?

Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.

Take 60-sec quiz

Get a personal report

A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.

Questions

Frequently asked

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.

Reduce fracture risk

What this outcome means

Who it's for

Post-menopausal womenHormonal shifts that thin bone faster after menopause.

Prone to fallsOlder adults whose balance makes a break more likely.

Low bone densityA scan flagging osteopenia or osteoporosis as a concern.

Stack buildersAlready taking supplements such as Vitamin D3 (Cholecalciferol) or Calcium Carbonate and want the dose right.

Evidence level

92Strong

Best ingredients

Vitamin D3 (Cholecalciferol) and Calcium Carbonate are the best supported ingredient signals for this outcome.

Dose mismatchDoseFit 56

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Calcium Carbonate 1000 mg vs 1000-1500 mg.

Processed

6.8k

Available

6.8k

Ingredients

Brands

533

Coverage

100%

Relevant ingredients

Which ingredient types matter for fracture riskOpen to see which ingredient types matter for fracture risk

7.5k products across 2 ingredient types — open to filter the ranking.

Use types to filter ranked products

Minerals & Trace Elements

3.6k products

Inorganic nutrients from calcium to zinc. The chemical form drives absorption – chelates and citrates usually beat cheap oxides.

Typical: , , , ...

Vitamins

3.9k products

Essential micronutrients the body can't make in sufficient amounts. Fat-soluble ones (A, D, E, K) store up; water-soluble ones need regular topping-up.

Typical: ,

Top decision cards

Best products for fracture risk

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for fracture risk

21st Century, Calcium Plus D3, 90 Tablets

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

Also helps with

Bone mineral density

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 1000-1500 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 1000-1500 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

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

21st CenturyClinical93Dose fit56Popularity99$0.13/ serving

Solgar, Calcium Citrate with Vitamin D3, 240 Tablets

SolgarClinical94Dose fit56Popularity89$0.31/ serving

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

21st CenturyClinical94Dose fit61Popularity84$0.21/ serving

KAL, Calcium Citrate D-3, 180 Tablets

KALClinical96Dose fit69Popularity50$0.30/ serving

Solgar, Calcium Magnesium with Vitamin D3, 300 Tablets

SolgarClinical94Dose fit56Popularity80$0.37/ serving

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

Nature's BountyClinical94Dose fit61Popularity68$0.22/ serving

NaturesPlus, Cal/Mag/Vit D3 with Vitamin K2, 180 Tablets

NaturesPlusClinical95Dose fit71Popularity84$0.63/ serving

Vitamatic, Calcium + D3, K2, B12, 365 Coated Tablets

VitamaticClinical94Dose fit61Popularity68$0.10/ serving

Solgar, Calcium "600" from Oyster Shell with Vitamin D3, 240 Tablets

SolgarClinical94Dose fit61Popularity50$0.16/ serving