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.

Improve calcium status

What this outcome means

Calcium status reflects whether enough calcium is available to support your bones, nerves, and muscle function from day to day. On DoseRank it maps to a defined health outcome built from human studies on serum and ionized calcium, urinary calcium, and bone-mineral markers – data sourced from open sources and specialized resources. DoseRank is not medical advice.

Who it's for

Below rangeLab results showing calcium availability dipping under normal levels.

Bone-health focusedPeople guarding mineral stores as bone density becomes a concern.

Limited intakeThose on dairy-free or restricted diets that fall short on calcium.

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

Evidence level

92Strong

Calcium Citrate and Vitamin D3 (Cholecalciferol) – have strong public evidence. DoseRank looks at both evidence quality and formula fit. A DoseFit Score of 66 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

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

Dose partly matchedDoseFit 66

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Calcium Citrate 630 mg vs 500-1200 mg.

Processed

7.4k

Available

7.4k

Ingredients

Brands

559

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 →

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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.

Improve calcium status

What this outcome means

Who it's for

Below rangeLab results showing calcium availability dipping under normal levels.

Bone-health focusedPeople guarding mineral stores as bone density becomes a concern.

Limited intakeThose on dairy-free or restricted diets that fall short on calcium.

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

Evidence level

92Strong

Best ingredients

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

Dose partly matchedDoseFit 66

Scores reward products dosed inside or above the studied range, not just the right ingredient. Examples: In range: Calcium Citrate 630 mg vs 500-1200 mg.

Processed

7.4k

Available

7.4k

Ingredients

Brands

559

Coverage

100%

Relevant ingredients

Which ingredient types matter for calcium statusOpen to see which ingredient types matter for calcium status

7.2k products across 2 ingredient types — open to filter the ranking.

Use types to filter ranked products

Minerals & Trace Elements

3.5k products

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

Typical: , , , ...

Vitamins

3.7k 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.

Top decision cards

Best products for calcium status

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for calcium status

21st Century, Calcium Citrate + D3 Maximum, 120 Tablets

21st Century$0.13 / serving4.8 · 21,504Available now

Also helps with

Kidney stone risk

Fracture risk

Vitamin D status

Why this ranks here

Evidence fitCalcium Citrate and Vitamin D3 (Cholecalciferol) are the strongest evidence signals for this outcome.
Dose fitCalcium Citrate at 630 mg lands inside the studied 500-1200 mg window.
Price / serving$0.13 per serving — mid 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

630 mgIn rangeinside the studied 500-1200 mg window

12.5 mcg

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

Amazing Nutrition, Amazing Formulas, Calcium Magnesium Zinc + Vitamin D3, 300 Tablets

Amazing NutritionClinical92Dose fit67Popularity76$0.16/ serving

Solgar, Calcium Citrate with Vitamin D3, 240 Tablets

SolgarClinical92Dose fit77Popularity89$0.31/ serving

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

NOW FoodsClinical90Dose fit62Popularity91$0.24/ serving

Solgar, Liquid Calcium Magnesium Citrate with Vitamin D3, Blueberry, 16 fl oz (473 ml)

SolgarClinical91Dose fit65Popularity91$0.32/ serving

Solgar, Liquid Calcium Magnesium Citrate with Vitamin D3, Strawberry, 16 fl oz (473 ml)

SolgarClinical91Dose fit65Popularity91$0.32/ serving

Solgar, Calcium Magnesium with Vitamin D3, 300 Tablets

SolgarClinical92Dose fit77Popularity80$0.37/ serving

Swanson Vitamins, Calcium Citrate & Vitamin D3, 250 Tablets

Swanson VitaminsClinical91Dose fit66Popularity76$0.17/ serving

Solgar, Liquid Calcium Magnesium Citrate with Vitamin D3, Orange-Vanilla, 16 fl oz (473 ml)

SolgarClinical91Dose fit65Popularity80$0.32/ serving

NOW Foods, Calcium Citrate, 250 Tablets

NOW FoodsClinical89Dose fit68Popularity91$0.20/ serving