Magnesium 250 mg

Magnesium 250 mg

21st Century4.7 (73,058 ratings)
Format:Tablet Quantity: 110 Tablet(s) · 110 servings
Goals
$4.99 $0.04 per serving

Product analysis

60 out of 100

Magnesium 250 mg can help fill a dietary magnesium gap and support normal energy and bone functions. The oxide form may be less readily absorbed, which matters when using it to replenish magnesium.

AI assessment of the formula, label and price. How scoring works

Nutrient Quality27

Magnesium oxide is a less favorable form for absorption. The calcium form is named, but a distinct quality advantage is not established.

Ingredient Transparency100

Both nutrient amounts and forms are stated. That makes the supplement straightforward to identify and compare.

Value For Money40

The magnesium content offers limited value when its form is considered. The value contributed by calcium remains uncertain.

Customer Satisfaction92

Customer feedback is very positive across tens of thousands of ratings. The large review base gives a broad picture of satisfaction without proving a particular health benefit.

Product Focus69

Magnesium gives the supplement a clear nutritional focus despite its many intended uses. Its clearest role is filling low intake, while stress and blood-vessel benefits are less predictable.

Format
Tablet
Container
110 Tablet(s)
Per serving
$0.04
Customer rating
4.7 · 73,058 ratings
Report analysis

Goals

Energy
Impact
Moderate effect
C Ingredient FitF PathwaysA- EvidenceA+ Formulation Logic
Magnesium · 250 mg
Study evidence
Magnesium Supportive 4 studies
Impact
High effect
C Ingredient FitD- PathwaysA- EvidenceA+ Formulation Logic
Magnesium · 250 mg
Study evidence
Magnesium Supportive 158 studies
Impact
High effect
B+ Ingredient FitD+ PathwaysA- EvidenceA+ Formulation Logic
Magnesium · 250 mg
Study evidence
Magnesium Supportive 114 studies
Stress Relief
Impact
Moderate effect
C Ingredient FitF PathwaysB EvidenceA+ Formulation Logic
Magnesium · 250 mg
Study evidence
Magnesium Supportive 13 studies
Cardiovascular Support
Impact
High effect
C Ingredient FitD- PathwaysB EvidenceA+ Formulation Logic
Magnesium · 250 mg
Study evidence
Magnesium Supportive 123 studies
Gut Health
Impact
High effect
C+ Ingredient FitD+ PathwaysB EvidenceA+ Formulation Logic
Magnesium · 250 mg
Study evidence
Magnesium Supportive 50 studies
Bone Health
Impact
High effect
B Ingredient FitD- PathwaysA+ EvidenceA+ Formulation Logic
Magnesium · 250 mgCalcium · 65 mg
Study evidence
Calcium Supportive 144 studies
Magnesium Supportive 48 studies

Ingredients

IngredientAmount per servingScore
Calcium (Calcium Carbonate)
65 mg
Magnesium (Magnesium Oxide)
250 mg 50
Gluten Free Adults 18–50
Report overview
F Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyD- Value
A serving provides 250 mg of magnesium at a low whole-product price. It uses Magnesium Oxide. No branded or fully chelated magnesium claim is specified.
How this ingredient is rated

Active Ingredient Quality & Bioavailability14

It uses Magnesium Oxide. No branded or fully chelated magnesium claim is specified.
Magnesium Form & Absorption Potential
It uses Magnesium Oxide.
Patented Materials & Chelation Quality
No branded or fully chelated magnesium claim is specified.

Dose, Safety & Label Transparency90

The elemental magnesium amount is stated. The serving has 65 mg calcium, with no qualifying cofactor indicated.
Elemental Yield Transparency
The label states 250 mg of elemental magnesium per serving.
Therapeutic Dosage Alignment
Each serving provides 250 mg of elemental magnesium.
Synergistic Formulation Logic
The serving has 65 mg calcium, with no qualifying cofactor indicated.

Value40

The serving price is low for the whole product; the magnesium comes from Magnesium Oxide.
Price Per Elemental Quality
The serving price is low for the whole product; the magnesium comes from Magnesium Oxide.
Report alternatives

Sources

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

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. Association between Serum Magnesium and Fractures: A Systematic Review and Meta-Analysis of Observational Studies.
    Dominguez LJ; Veronese N; Ciriminna S; Pérez-Albela JL; Vásquez-López VF; Rodas-Regalado S; Di Bella G; Parisi A; Tagliaferri F; Barbagallo M · Nutrients · 2023
    Meta-analysis119,755 participants4 studies pooledBone Health forMagnesium
  7. Bioabsorbable Magnesium-Based Materials Potential and Safety in Bone Surgery: A Systematic Review.
    Hung CH; Kwok YC; Yip J; Wong HH; Leung YY · Craniomaxillofacial trauma & reconstruction · 2025
    Systematic review386 participants8 studies pooledBone Health forMagnesium
  8. Vascularized bone grafting fixed by biodegradable magnesium screw for treating osteonecrosis of the femoral head.
    Zhao D; Huang S; Lu F; Wang B; Yang L; Qin L; Yang K; Li Y; Li W; Wang W; Tian S; Zhang X; Gao W; Wang Z; Zhang Y; Xie X; Wang J; Li J · Biomaterials · 2016
    Randomized trial48 participantsBone Health forMagnesium
  9. An update on magnesium and bone health.
    Rondanelli M; Faliva MA; Tartara A; Gasparri C; Perna S; Infantino V; Riva A; Petrangolini G; Peroni G · Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2022
    Narrative reviewBone Health forMagnesium
  10. Sex-specific differences in the association of magnesium intake with femoral neck bone mineral density among older adults.
    Wang B; Tan X; Yao X; Zhu Z · Endocrine connections · 2025
    Cross-sectional study1,343 participantsBone Health forMagnesium
  11. Circulating and dietary magnesium and risk of cardiovascular disease: a systematic review and meta-analysis of prospective studies.
    Del Gobbo LC; Imamura F; Wu JH; de Oliveira Otto MC; Chiuve SE; Mozaffarian D · The American journal of clinical nutrition · 2013
    Meta-analysis313,041 participants16 studies pooledCardiovascular Support forMagnesium
  12. Magnesium and the risk of cardiovascular events: a meta-analysis of prospective cohort studies.
    Qu X; Jin F; Hao Y; Li H; Tang T; Wang H; Yan W; Dai K · PloS one · 2013
    Meta-analysis532,979 participants19 studies pooledCardiovascular Support forMagnesium
  13. Quantitative Association Between Serum/Dietary Magnesium and Cardiovascular Disease/Coronary Heart Disease Risk: A Dose-Response Meta-analysis of Prospective Cohort Studies.
    Zhao L; Hu M; Yang L; Xu H; Song W; Qian Y; Zhao M · Journal of cardiovascular pharmacology · 2020
    Meta-analysis544,581 participants18 studies pooledCardiovascular Support Heart Health forMagnesium
  14. 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-analysisCardiovascular Support Heart Health forMagnesium
  15. Serum magnesium, mortality, and cardiovascular disease in chronic kidney disease and end-stage renal disease patients: a systematic review and meta-analysis.
    Xiong J; He T; Wang M; Nie L; Zhang Y; Wang Y; Huang Y; Feng B; Zhang J; Zhao J · Journal of nephrology · 2020
    Meta-analysis200,934 participants20 studies pooledCardiovascular Support forMagnesium
  16. Magnesium-L-threonate improves sleep quality and daytime functioning in adults with self-reported sleep problems: A randomized controlled trial.
    Hausenblas HA; Lynch T; Hooper S; Shrestha A; Rosendale D; Gu J · Sleep medicine: X · 2025
    Randomized trial80 participantsEnergy forMagnesium
  17. Total magnesium intake and risk of frailty in older women.
    Struijk EA; Fung TT; Bischoff-Ferrari HA; Willett WC; Lopez-Garcia E · Journal of cachexia, sarcopenia and muscle · 2024
    Cohort study81,524 participantsEnergy forMagnesium
  18. Red blood cell magnesium and chronic fatigue syndrome.
    Cox IM; Campbell MJ; Dowson D · Lancet (London, England) · 1991
    Randomized trial32 participantsEnergy forMagnesium
  19. Exercise, magnesium and immune function.
    Laires MJ; Monteiro C · Magnesium research · 2008
    Narrative reviewEnergy forMagnesium
  20. Perioperative systemic magnesium to minimize postoperative pain: a meta-analysis of randomized controlled trials.
    De Oliveira GS; Castro-Alves LJ; Khan JH; McCarthy RJ · Anesthesiology · 2013
    Meta-analysis1,257 participants20 studies pooledEveryday Health forMagnesium