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

Improve magnesium status

DOSERANKEVIDENCE-BASED SUPPLEMENTS

Best Supplements for Magnesium status — 3554 Ranked | DOSERANK

Top decision cards

Best products for magnesium status

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for magnesium status

NOW Foods, Magnesium Citrate Pure Powder, 8 oz (227 g)

NOW Foods$0.16 / serving4.6 · 9,895Available now

Also helps with

Bowel regularity

Constipation

Blood pressure

Why this ranks here

Evidence fitMagnesium Citrate is the strongest evidence signal for this outcome.
Dose fitMagnesium Citrate at 450 mg lands inside the studied 200-500 mg window.
Price / serving$0.16 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

450 mgIn rangeinside the studied 200-500 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g)

NOW FoodsClinical89Dose fit73Popularity98$0.18/ serving

NOW Foods, Magnesium Citrate, 200 mg, 250 Tablets

NOW FoodsClinical89Dose fit82Popularity97$0.19/ serving

Nutricost, Magnesium Glycinate, Unflavored , 8.9 oz (250 g)

NutricostClinical89Dose fit67Popularity97$0.13/ serving

Natural Factors, Magnesium Citrate, 360 Capsules (150 mg per Capsule)

Natural FactorsClinical89Dose fit86Popularity90$0.22/ serving

NOW Foods, Magnesium Glycinate, 180 Tablets (100 mg per Tablet)

NOW FoodsClinical89Dose fit67Popularity100$0.21/ serving

NOW Foods, Magnesium Glycinate With BioPerine®, 180 Veg Capsules

NOW FoodsClinical89Dose fit67Popularity99$0.20/ serving

KAL, Chelated Magnesium Bisglycinate, 180 Tablets (105 mg per Tablet)

KALClinical89Dose fit73Popularity97$0.25/ serving

Solgar, Magnesium Citrate, 120 Tablets (200 mg per Tablet)

SolgarClinical89Dose fit82Popularity98$0.23/ serving

Micro Ingredients, Magnesium Glycinate, 240 Vegetarian Capsules (175 mg per Capsule)

Micro IngredientsClinical89Dose fit84Popularity90$0.15/ serving

Top decision cards

Best products for magnesium status

Ranking by · Composite outcome score

Best overall — the composite outcome score.

Top pick · DoseRank

Why this ranks #1 for magnesium status

NOW Foods, Magnesium Citrate Pure Powder, 8 oz (227 g)

NOW Foods$0.16 / serving4.6 · 9,895Available now

Also helps with

Bowel regularity

Constipation

Blood pressure

Why this ranks here

Evidence fitMagnesium Citrate is the strongest evidence signal for this outcome.
Dose fitMagnesium Citrate at 450 mg lands inside the studied 200-500 mg window.
Price / serving$0.16 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

450 mgIn rangeinside the studied 200-500 mg window

Compare top 3 Product data Open at retailer

The rest of the ranking · DoseRank

Top 10 ranked products

NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g)

NOW FoodsClinical89Dose fit73Popularity98$0.18/ serving

NOW Foods, Magnesium Citrate, 200 mg, 250 Tablets

NOW FoodsClinical89Dose fit82Popularity97$0.19/ serving

Nutricost, Magnesium Glycinate, Unflavored , 8.9 oz (250 g)

NutricostClinical89Dose fit67Popularity97$0.13/ serving

Natural Factors, Magnesium Citrate, 360 Capsules (150 mg per Capsule)

Natural FactorsClinical89Dose fit86Popularity90$0.22/ serving

NOW Foods, Magnesium Glycinate, 180 Tablets (100 mg per Tablet)

NOW FoodsClinical89Dose fit67Popularity100$0.21/ serving

NOW Foods, Magnesium Glycinate With BioPerine®, 180 Veg Capsules

NOW FoodsClinical89Dose fit67Popularity99$0.20/ serving

KAL, Chelated Magnesium Bisglycinate, 180 Tablets (105 mg per Tablet)

KALClinical89Dose fit73Popularity97$0.25/ serving

Solgar, Magnesium Citrate, 120 Tablets (200 mg per Tablet)

SolgarClinical89Dose fit82Popularity98$0.23/ serving

Micro Ingredients, Magnesium Glycinate, 240 Vegetarian Capsules (175 mg per Capsule)

Micro IngredientsClinical89Dose fit84Popularity90$0.15/ serving

Improve magnesium status

Improve magnesium status

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

Minerals & Trace Elements

Amino Acids & Derivatives

Vitamins

Best products for magnesium status

NOW Foods, Magnesium Citrate Pure Powder, 8 oz (227 g)

NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g)

NOW Foods, Magnesium Citrate, 200 mg, 250 Tablets

Nutricost, Magnesium Glycinate, Unflavored , 8.9 oz (250 g)

Natural Factors, Magnesium Citrate, 360 Capsules (150 mg per Capsule)

NOW Foods, Magnesium Glycinate, 180 Tablets (100 mg per Tablet)

NOW Foods, Magnesium Glycinate With BioPerine®, 180 Veg Capsules

KAL, Chelated Magnesium Bisglycinate, 180 Tablets (105 mg per Tablet)

Solgar, Magnesium Citrate, 120 Tablets (200 mg per Tablet)

Micro Ingredients, Magnesium Glycinate, 240 Vegetarian Capsules (175 mg per Capsule)

What every metric means

Compare the top 3, side by side

Not sure which is right for you?

Get a personal report

Frequently asked

Best products for magnesium status

NOW Foods, Magnesium Citrate Pure Powder, 8 oz (227 g)

NOW Foods, Magnesium Bisglycinate Powder, 8 oz (227 g)

NOW Foods, Magnesium Citrate, 200 mg, 250 Tablets

Nutricost, Magnesium Glycinate, Unflavored , 8.9 oz (250 g)

Natural Factors, Magnesium Citrate, 360 Capsules (150 mg per Capsule)

NOW Foods, Magnesium Glycinate, 180 Tablets (100 mg per Tablet)

NOW Foods, Magnesium Glycinate With BioPerine®, 180 Veg Capsules

KAL, Chelated Magnesium Bisglycinate, 180 Tablets (105 mg per Tablet)

Solgar, Magnesium Citrate, 120 Tablets (200 mg per Tablet)

Micro Ingredients, Magnesium Glycinate, 240 Vegetarian Capsules (175 mg per Capsule)

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

Minerals & Trace Elements

Amino Acids & Derivatives

Vitamins

Compare the top 3, side by side