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Buffered Chelated Magnesium

4.8
★ ★ ★ ★ ★
(17244 ratings)
Magnesium 200 mg
Product Image
Score85
Low-cost, one-capsule dosing is practical, and bisglycinate improves the blend. Undisclosed form proportions and magnesium oxide limit quality and tolerance confidence.
How scoring works
Capsule
Quantity:60 Capsule(s) • (60 servings)
Goals:
General Health
Stress Relief
Energy
Heart Health
Cardiovascular Support
Digestive Health
Bone Health

Score 85

Low-cost, one-capsule dosing is practical, and bisglycinate improves the blend. Undisclosed form proportions and magnesium oxide limit quality and tolerance confidence.
How scoring works

Also available as

1 option
120 servings 1 Capsule(s) • 120 Capsule(s) • 120 servings $32.76 ($0.27 per serving)
$17.56($0.29 per serving)
iHerb
$ 17.56
Vitacost
$ 17.56
Daily Vita
$ 17.56
Walmart
$ 17.56
iHerb
$ 17.56
Vitacost
$ 17.56
Report prices

Analysis

The formula combines magnesium bisglycinate chelate with magnesium oxide for a stated 200 mg serving. Bisglycinate is a well-tolerated organic form, while oxide is less efficiently absorbed and acts mainly as a low-cost buffer.

The amount can support routine magnesium intake across general health, energy, and muscle or nerve function. Mixed form quality makes it less suitable for someone specifically paying for fully chelated glycinate.

One capsule per serving and a low serving cost make daily use simple. The trade-off is that the label does not disclose how much of the elemental amount comes from bisglycinate versus oxide.

Who is it for
  • Adults comfortable with capsules
  • Users seeking broad magnesium support
  • People who can account for dietary and supplemental magnesium
Best for
  • Routine magnesium supplementation
  • Muscle, nerve, and energy support
  • Capsules dosing

Pros

  • Includes magnesium bisglycinate
  • Clearly states 200 mg elemental magnesium
  • One capsule per serving
  • Low cost per serving

Cons

  • Contains lower-quality magnesium oxide
  • Does not disclose the proportion from each form
  • No supporting cofactor
  • Not equivalent to a fully chelated glycinate product

Warnings

  • Magnesium oxide can cause loose stools or abdominal discomfort
  • Kidney impairment can reduce clearance of the 200 mg magnesium serving
  • Separate magnesium from tetracycline or quinolone antibiotics and bisphosphonates because it can reduce their absorption

Nutrient quality

86 Highest impact

The formula contains little apparent low-value padding. A low-absorption form materially weakens the formula.

Ingredient transparency

75 High impact

No broad blend hides the core amount, though complex naming reduces clarity. A complete inactive ingredient list is not supplied.

Customer satisfaction

93 Highest impact

The large review count makes the aggregate rating highly reliable. Specific experiences are absent, but the strong aggregate rating is broadly consistent with satisfaction.

Value for money

89 Highest impact

The price is supported mainly by useful core ingredients. The formula quality broadly supports its value despite a notable trade-off.

Report analysis

Goals

General Health
Stress Resilience
General Health
Impact
High effect
A Goal FitB- Strength of SupportD CoverageA- Formula Quality
Magnesium · 200 mg

Magnesium directly supports energy metabolism, muscle function, and nervous-system health. The elemental amount is meaningful and clearly disclosed.

Bisglycinate improves the absorption profile, but buffering with magnesium oxide prevents consistently high form quality. The oxide component may cause loose stools or abdominal discomfort in sensitive users.

Study evidence
Magnesium Supportive 114 studies
Stress Relief
Calm and Tension Relief
Stress Relief
Impact
High effect
A- Goal FitB- Strength of SupportC- CoverageA Formula Quality
Magnesium · 200 mg

Magnesium provides direct nervous-system and muscle support at a meaningful but moderate amount. Its role in correcting inadequate magnesium intake is well established, though direct stress-relief effects vary by baseline status.

Magnesium bisglycinate improves form quality, while magnesium oxide lowers expected absorption. The streamlined tablet stays focused but does not address cortisol or neurotransmitter pathways separately.

Study evidence
Magnesium Supportive 13 studies
Energy
Energy
Impact
High effect
B+ Goal FitB Strength of SupportD CoverageA Formula Quality
Magnesium · 200 mg

Magnesium reaches the 200 mg threshold for meaningful support of ATP-dependent enzymes. Bisglycinate provides a useful absorbed component in a focused one-capsule formula.

Buffering with magnesium oxide lowers the blend’s overall absorption quality. The product supports one metabolic cofactor pathway rather than alertness or stress resilience.

Study evidence
Magnesium Supportive 4 studies
Heart Health
Healthy Blood Pressure
Heart Health
Impact
High effect
B+ Goal FitC+ Strength of SupportC- CoverageA Formula Quality
Magnesium · 200 mg

Magnesium supports normal vascular tone, cardiac rhythm, and cellular energy at a meaningful but moderate amount. Its cardiovascular role is well established, especially when intake is inadequate.

Bisglycinate improves form quality, while magnesium oxide lowers expected absorption. The streamlined formula covers one important mineral pathway without lipid or cardiac-energy support.

Study evidence
Magnesium Supportive 158 studies
Cardiovascular Support
Heart Muscle and Rhythm
Cardiovascular Support
Impact
High effect
B- Goal FitB Strength of SupportD CoverageB Formula Quality
Magnesium · 200 mg

Magnesium supports vascular relaxation and normal cardiac electrical function, giving the formula clear but narrow relevance. Buffering the bisglycinate with magnesium oxide reduces absorption quality.

The disclosed elemental amount is practical for routine use. A focused formula avoids unrelated ingredients, although the oxide component may cause loose stools in sensitive users.

Study evidence
Magnesium Supportive 123 studies
Digestive Health
Digestive Health
Impact
High effect
B- Goal FitB- Strength of SupportD CoverageB+ Formula Quality
Magnesium · 200 mg

Buffered magnesium bisglycinate and oxide may support bowel motility and softer stool, giving the product a clear but narrow digestive role. The osmotic effect of magnesium is established, although response and tolerance vary with the form and the user's baseline intake.

The disclosed elemental amount is substantial for daily magnesium support. Bisglycinate supports absorption, while oxide lowers systemic quality and may be more likely to loosen stools. The single-mineral design is easy to assess and avoids unrelated ingredients. Magnesium oxide may cause loose stool or cramping in sensitive users.

Study evidence
Magnesium Supportive 50 studies

Ingredients

IngredientAmount per serving
Magnesium (Magnesium Bisglycinate Chelate, Magnesium Oxide)
 200 mg
Gluten Free Adults 18–50 Vegan Kosher Dairy Free Sugar Free No Allergies Vegetarian
Report overview
Magnesium (Magnesium Bisglycinate Chelate, Magnesium Oxide) · 200 mg OverallScore67
D- Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyB- Value

Bisglycinate supports absorption, but buffering with magnesium oxide lowers the blend’s quality. The elemental amount is well aligned, while no patented chelation standard or added uptake co-factor is disclosed. A low serving cost supports reasonable value, though oxide may increase the chance of loose stools.

View ingredientView products
Loading alternative details
85 Performance

Cal/Mag 500 mg/250 mg

NaturesPlus
A more purposeful active profile is better aligned with the original’s main use because chelated calcium and magnesium provide a focused, balanced mineral formula with strong form quality. A simple one-serving format and economical cost make it one of the better value profiles in this set.
85 Performance

Magnesium Bisglycinate 200 mg

Natural Factors
A more purposeful active profile is better aligned with the original’s main use because a focused magnesium bisglycinate powder uses a highly absorbable form at a moderate, practical amount. Strong aggregate satisfaction and reasonable serving economics support value without an aggressive dose.
85 Performance

Magnesium Bisglycinate Chelate

Healthy Origins
A more purposeful active profile is better aligned with the original’s main use because tRAACS magnesium bisglycinate provides premium absorption quality, a useful elemental amount, and exceptional serving value in a clean powder. The product is narrow rather than comprehensive, and its relatively weak satisfaction metric deserves consideration despite the strong formula.
83 Budget

Magnesium Citrate Pure Powder

Best Naturals
Lower serving cost makes it the more economical option, while a well-aligned amount of magnesium citrate delivers useful absorption in a focused powder. The simple formula and very low serving cost provide strong value, with digestive tolerance as the main practical uncertainty.
91 Budget

Krebs Magnesium Potassium Complex

Nature's Way
Lower serving cost makes it the more economical option, while magnesium lysinate and malate provide favorable forms at a useful amount, with a modest potassium contribution. The focused formula offers excellent serving value.
88 Budget

Magnesium Bisglycinate Powder

NOW
Lower serving cost makes it the more economical option, while magnesium bisglycinate supplies a well-absorbed form at a practical, moderate amount. The pure powder is adjustable, clearly labeled, and inexpensive, supporting strong routine value.
84 Value

Potassium + Magnesium

Nutricost
Ingredient quality and serving value are better balanced here because a meaningful magnesium citrate amount anchors a simple two-mineral electrolyte formula. Potassium is modest, but the focused design and very low serving cost support excellent everyday value.
83 Value

Magnesium Citrate 200 mg

Best Naturals
Ingredient quality and serving value are better balanced here because a substantial amount of magnesium citrate combines useful absorption with a focused single-active design. Digestive sensitivity is the main trade-off, while the low serving cost supports strong practical value.
80 Value

Magnesium Caps 500 mg

Life Extension
Ingredient quality and serving value are better balanced here because citrate, succinate, and a named glycinate chelate strengthen a multi-form magnesium blend, while oxide lowers average absorption. The large supplemental amount may cause diarrhea or cramping, although the very low serving cost provides strong value for users who tolerate it.
Report alternatives

Sources

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

  1. 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 pooledGeneral Health forMagnesium
  2. Hospital-Acquired Dysmagnesemia and In-Hospital Mortality.
    Cheungpasitporn W; Thongprayoon C; Chewcharat A; Petnak T; Mao MA; Davis PW; Bathini T; Vallabhajosyula S; Qureshi F; Erickson SB · Medical sciences (Basel, Switzerland) · 2024
    Cohort study26,020 participantsGeneral Health forMagnesium
  3. Magpie Trial in the UK: methods and additional data for women and children at 2 years following pregnancy complicated by pre-eclampsia.
    Smyth RM; Spark P; Armstrong N; Duley L · BMC pregnancy and childbirth · 2009
    Randomized trial1,601 participantsGeneral Health forMagnesium
  4. 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 pooledGeneral Health Cardiovascular Support forMagnesium
  5. 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
  6. Exercise, magnesium and immune function.
    Laires MJ; Monteiro C · Magnesium research · 2008
    Narrative reviewEnergy forMagnesium
  7. The effect of food, vitamin, or mineral supplements on chronic constipation in adults: A systematic review and meta-analysis of randomized controlled trials.
    van der Schoot A; Creedon A; Whelan K; Dimidi E · Neurogastroenterology and motility · 2023
    Meta-analysis787 participants8 studies pooledDigestive Health forMagnesium
  8. Diagnosis of magnesium-induced diarrhea.
    Fine KD; Santa Ana CA; Fordtran JS · The New England journal of medicine · 1991
    Clinical trial19 participantsDigestive Health forMagnesium
  9. Effect of the laxative magnesium oxide on gastrointestinal functional recovery in fast-track colonic resection: a double-blind, placebo-controlled randomized study.
    Andersen J; Christensen H; Pachler JH; Hallin M; Thaysen HV; Kehlet H · Colorectal disease : the official journal of the Association of Coloproctology of Great Britain and Ireland · 2012
    Randomized trial49 participantsDigestive Health forMagnesium
  10. Lactobacillus reuteri DSM 17938 and Magnesium Oxide in Children with Functional Chronic Constipation: A Double-Blind and Randomized Clinical Trial.
    Kubota M; Ito K; Tomimoto K; Kanazaki M; Tsukiyama K; Kubota A; Kuroki H; Fujita M; Vandenplas Y · Nutrients · 2020
    Randomized trial60 participantsDigestive Health forMagnesium
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. Efficacy of oral magnesium therapy in the treatment of chronic constipation in spastic cerebral palsy children: a randomized controlled trial.
    Hassanein SMA; Deifallah SM; Bastawy HA · World journal of pediatrics : WJP · 2021
    Randomized trial100 participantsDigestive Health forMagnesium
  21. Ca:Mg ratio, medium-chain fatty acids, and the gut microbiome.
    Fan L; Zhu X; Sun S; Yu C; Huang X; Ness R; Dugan LL; Shu L; Seidner DL; Murff HJ; Fodor AA; Azcarate-Peril MA; Shrubsole MJ; Dai Q · Clinical nutrition (Edinburgh, Scotland) · 2022
    Randomized trial240 participantsDigestive Health forMagnesium
  22. The Magnesium-Rich Formula for Functional Constipation in Infants: a Randomized Comparator-Controlled Study.
    Benninga MA; MENA Infant Constipation Study Group; Vandenplas Y · Pediatric gastroenterology, hepatology & nutrition · 2022
    Randomized trial286 participantsDigestive Health forMagnesium
  23. A Randomized Double-blind Placebo-controlled Trial on the Effect of Magnesium Oxide in Patients With Chronic Constipation.
    Mori S; Tomita T; Fujimura K; Asano H; Ogawa T; Yamasaki T; Kondo T; Kono T; Tozawa K; Oshima T; Fukui H; Kimura T; Watari J; Miwa H · Journal of neurogastroenterology and motility · 2022
    Randomized trial34 participantsDigestive Health forMagnesium
  24. Magnesium treatment increases gut microbiome synthesizing vitamin D and inhibiting colorectal cancer: results from a double-blind precision-based randomized placebo-controlled trial.
    Sun E; Zhu X; Ness RM; Murff HJ; Sun S; Yu C; Fan L; Azcarate-Peril MA; Shrubsole MJ; Dai Q · The American journal of clinical nutrition · 2025
    Randomized trial240 participantsDigestive Health forMagnesium
  25. 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
  26. Red blood cell magnesium and chronic fatigue syndrome.
    Cox IM; Campbell MJ; Dowson D · Lancet (London, England) · 1991
    Randomized trial32 participantsEnergy forMagnesium
  27. Long-term outcome after intravenous magnesium sulphate in suspected acute myocardial infarction: the second Leicester Intravenous Magnesium Intervention Trial (LIMIT-2).
    Woods KL; Fletcher S · Lancet (London, England) · 1994
    Randomized trial2,316 participantsGeneral Health forMagnesium
  28. Association of magnesium sulfate use with mortality in critically ill patients with sepsis: a retrospective propensity score-matched cohort study.
    Gu WJ; Duan XJ; Liu XZ; Cen Y; Tao LY; Lyu J; Yin HY · British journal of anaesthesia · 2023
    Cohort study10,999 participantsGeneral Health forMagnesium
  29. Hypomagnesemia and Mortality in Incident Hemodialysis Patients.
    Li L; Streja E; Rhee CM; Mehrotra R; Soohoo M; Brunelli SM; Kovesdy CP; Kalantar-Zadeh K · American journal of kidney diseases : the official journal of the National Kidney Foundation · 2016
    Cohort study9,359 participantsGeneral Health forMagnesium
  30. The effects of magnesium supplementation on abnormal uterine bleeding, alopecia, quality of life, and acne in women with polycystic ovary syndrome: a randomized clinical trial.
    Jaripur M; Ghasemi-Tehrani H; Askari G; Gholizadeh-Moghaddam M; Clark CCT; Rouhani MH · Reproductive biology and endocrinology : RB&E · 2022
    Randomized trial64 participantsGeneral Health forMagnesium
  31. Effects of magnesium supplementation on improving hyperglycemia, hypercholesterolemia, and hypertension in type 2 diabetes: A pooled analysis of 24 randomized controlled trials.
    Xu L; Li X; Wang X; Xu M · Frontiers in nutrition · 2023
    Meta-analysis1,325 participants24 studies pooledHeart Health forMagnesium
  32. The effect of lowering blood pressure by magnesium supplementation in diabetic hypertensive adults with low serum magnesium levels: a randomized, double-blind, placebo-controlled clinical trial.
    Guerrero-Romero F; Rodríguez-Morán M · Journal of human hypertension · 2009
    Randomized trial82 participantsHeart Health forMagnesium
  33. Positive effects of magnesium supplementation in metabolic syndrome.
    Kisters S; Kisters K; Werner T; Vormann J; Tokmak F; Westhoff T; Gröber U; Predel HG; Reuter H · International journal of clinical pharmacology and therapeutics · 2024
    Randomized trial54 participantsHeart Health forMagnesium
  34. Role of magnesium supplementation in the treatment of depression: A randomized clinical trial.
    Tarleton EK; Littenberg B; MacLean CD; Kennedy AG; Daley C · PloS one · 2017
    Randomized trial126 participantsStress Relief forMagnesium
  35. Effects of Intravenous Esketamine or Magnesium Sulfate on Early Postoperative Negative Emotions and Pain in Patients Undergoing Endoscopic Sinus Surgery: A Randomized Controlled Trial.
    Wang L; Zhou J; Liu Q; Qian K; Wang L; Xie C · Therapeutics and clinical risk management · 2026
    Randomized trial137 participantsStress Relief forMagnesium
  36. Effect of short-term magnesium supplementation on anxiety, depression and sleep quality in patients after open-heart surgery.
    Saba S; Faizi F; Sepandi M; Nehrir B · Magnesium research · 2022
    Non-randomized trial60 participantsStress Relief forMagnesium
  37. Effects of dry needling compared to magnesium infiltration in trigger points for patients with myofascial pain syndrome: a randomized controlled study in Tunisia.
    Dhouibi J; Moncer R; Kalbousi N; Gaddour M; Laayouni S; Ouanes W; Kacem B; Jemni S · Korean journal of family medicine · 2026
    Randomized trial45 participantsStress Relief forMagnesium
  38. Effect of magnesium and vitamin B6 supplementation on mental health and quality of life in stressed healthy adults: Post-hoc analysis of a randomised controlled trial.
    Noah L; Dye L; Bois De Fer B; Mazur A; Pickering G; Pouteau E · Stress and health : journal of the International Society for the Investigation of Stress · 2021
    Randomized trialStress Relief forMagnesium
  39. Magnesium and anabolic hormones in older men.
    Maggio M; Ceda GP; Lauretani F; Cattabiani C; Avantaggiato E; Morganti S; Ablondi F; Bandinelli S; Dominguez LJ; Barbagallo M; Paolisso G; Semba RD; Ferrucci L · International journal of andrology · 2012
    Cohort study399 participantsTestosterone Support forMagnesium
  40. Analysis of the relationship between the blood concentration of several metals, macro- and micronutrients and endocrine disorders associated with male aging.
    Rotter I; Kosik-Bogacka DI; Dołęgowska B; Safranow K; Kuczyńska M; Laszczyńska M · Environmental geochemistry and health · 2017
    Cross-sectional study313 participantsTestosterone Support forMagnesium
  41. Effect of magnesium supplementation in improving hyperandrogenism, hirsutism, and sleep quality in women with polycystic ovary syndrome: A randomized, placebo-controlled clinical trial.
    Gholizadeh-Moghaddam M; Ghasemi-Tehrani H; Askari G; Jaripur M; Clark CCT; Rouhani MH · Health science reports · 2024
    Randomized trial64 participantsTestosterone Support forMagnesium
  42. The effects of trace element supplementation on glycolipid metabolism in PCOS: a systematic review and meta-analysis.
    Yang L; Gao Y; Zhao W; Qi Y; Duo X; Wang H · Frontiers in nutrition · 2025
    Meta-analysis1,600 participants25 studies pooledTestosterone Support forMagnesium
  43. Effects of magnesium supplementation on testosterone levels of athletes and sedentary subjects at rest and after exhaustion.
    Cinar V; Polat Y; Baltaci AK; Mogulkoc R · Biological trace element research · 2011
    Non-randomized trial20 participantsTestosterone Support forMagnesium