ZMA

ZMA

PrimaForce4.6 (2,591 ratings)
Format:Capsule Quantity: 180 Capsule(s) · 60 servings
Goals
$22.99 $0.38 per serving

About this product

The main strength is an affordable combination for replacing magnesium, zinc or B6 gaps. Magnesium aspartate and the named zinc sources have favorable form characteristics, but those forms do not establish a special combined effect.

The serving provides 450 mg elemental magnesium, above the main comparison range used in its ingredient assessment. Zinc is recorded as 30 mg total from aspartate and monomethionine, with the share from each source undisclosed and copper unquantified.

Normal muscle function and energy metabolism are more supported uses than routine testosterone or performance enhancement. Adequately nourished adults have no clear basis for expecting greater strength, productivity or sustained stress relief simply from taking the larger mineral amounts.

Who is it for
  • Adults with low magnesium or zinc intake who want a short, defined nutrient combination
Best for
  • Replacing mineral gaps relevant to normal muscle and energy function

Pros

  • Magnesium amount is stated as elemental magnesium
  • Magnesium aspartate and both zinc sources are named
  • Good value for the magnesium contribution
  • A short active list makes the main exposures easier to track

Cons

  • The proportions of the two zinc sources are undisclosed
  • Copper amount is unknown
  • No established extra testosterone or performance benefit with adequate nutrient intake
  • The magnesium form does not establish a targeted cognitive effect

Warnings

  • The 450 mg magnesium serving is above the main ingredient comparison range; review total exposure before adding another magnesium supplement
  • The 30 mg zinc serving adds a substantial amount, so include other zinc products when checking combined intake

Product analysis

70 out of 100

ZMA combines magnesium, zinc and B6 to support normal nutrition, especially when dietary intake is low. The mineral forms compare favorably, although the shares of the two zinc forms are undisclosed.

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

Nutrient Quality67

Magnesium and zinc use favorably assessed forms. B6 quality is less certain, and the undisclosed zinc proportions limit a precise blend comparison.

Ingredient Transparency80

All nutrient amounts and forms are named, helping you compare servings. The relative shares of the zinc forms are missing.

Value For Money62

Magnesium offers favorable value, while zinc is reasonably priced for the serving. B6 value remains uncertain.

Customer Satisfaction84

Customer feedback is positive across thousands of ratings. The large response provides an established picture of satisfaction.

Product Focus60

A short ingredient list serves a wide range of nutritional roles. Benefits for mood, energy and other goals are most plausible when low intake is being corrected.

Format
Capsule
Container
180 Capsule(s)
Per serving
$0.38
Customer rating
4.6 · 2,591 ratings
Report analysis

Goals

Everyday Health
Impact
Highest effect
A- Ingredient FitA+ PathwaysA- EvidenceA+ Formulation Logic
Magnesium · 450 mgZinc · 30 mg

Magnesium contributes to energy metabolism and mineral nutrition, zinc to normal immune and antioxidant functions, and vitamin B6 to one-carbon metabolism and blood formation. These nutritional roles extend across several areas when intake is low. All three reach the supplied amount comparison’s upper allowance, which does not establish extra benefit above adequate intake, a special combination effect, or safety of the serving.

How this product is rated for Everyday Health

Ingredient fit89

The contributing ingredients reach the upper amount allowance; larger amounts do not establish greater health benefits.
Goal fit
The contributing ingredients are focused on general health, although the product is also linked to other goals.
Dose adequacy
The contributing ingredients reach the upper amount allowance; larger amounts do not establish greater health benefits.

Pathways100

The strongest contribution is in energy metabolism, with substantial support in the supplied comparison. Contributions extend across several areas, providing broad nutritional coverage for this goal.
Depth
The strongest contribution is in energy metabolism, with substantial support in the supplied comparison.
Breadth
Contributions extend across several areas, providing broad nutritional coverage for this goal.

Evidence86

Magnesium leads the supplied evidence comparison; normal nutritional functions do not establish additional benefit when intake is adequate.
Evidence strength
Magnesium leads the supplied evidence comparison; normal nutritional functions do not establish additional benefit when intake is adequate.
Studied preparation
The contributing ingredients with qualifying amounts match accepted preparations, without establishing superior effects from their particular forms.

Formulation logic100

All retained contributors reach the comparison’s minimum amount allowance; this is not a proven clinical treatment threshold.
Partner coverage
The contributing ingredients can act independently or have their required partners; an extra combination benefit is not established.
Conflicts
No configured ingredient conflict was identified in the supplied facts.
Effective doses
All retained contributors reach the comparison’s minimum amount allowance; this is not a proven clinical treatment threshold.
Study evidence
Magnesium Supportive 114 studies
Zinc Supportive 60 studies
Bone Health
Impact
Highest effect
A- Ingredient FitB+ PathwaysA+ EvidenceA+ Formulation Logic
Magnesium · 450 mgZinc · 30 mg

Magnesium supplies a mineral needed for normal bone metabolism, while zinc supports bone-forming enzymes. These roles are most useful for filling nutritional gaps; they do not establish extra bone density or fracture protection when intake is adequate. The magnesium amount meets the saved comparison benchmark. B6 receives a saved contribution, but the supplied context does not establish an independent skeletal benefit.

How this product is rated for Bone Health

Ingredient fit87

The credited nutrients give the product a focused bone-health connection. Most counted amounts provide substantial exposure against the saved comparison benchmarks.
Goal fit
The credited nutrients give the product a focused bone-health connection.
Dose adequacy
Most counted amounts provide substantial exposure against the saved comparison benchmarks.

Pathways80

The strongest saved finding concerns collagen matrix formation. Two bone processes reach the saved coverage benchmark; other aspects remain less covered.
Depth
The strongest saved finding concerns collagen matrix formation.
Breadth
Two bone processes reach the saved coverage benchmark; other aspects remain less covered.

Evidence98

Zinc leads the saved evidence finding, but its essential bone-forming role does not establish extra bone-density or fracture benefits in adequately nourished adults.
Evidence strength
Zinc leads the saved evidence finding, but its essential bone-forming role does not establish extra bone-density or fracture benefits in adequately nourished adults.
Studied preparation
The saved finding accepts the counted preparations at qualifying amounts; it does not establish a trial of the whole product.

Formulation logic100

No counted ingredient lacks a required partner in the saved finding; this does not establish added combination benefits. All counted ingredients meet the saved amount threshold; that threshold does not establish clinical effectiveness.
Partner coverage
No counted ingredient lacks a required partner in the saved finding; this does not establish added combination benefits.
Conflicts
No configured ingredient conflict was triggered by the supplied facts.
Effective doses
All counted ingredients meet the saved amount threshold; that threshold does not establish clinical effectiveness.
Study evidence
Magnesium Supportive 48 studies
Zinc Supportive 33 studies
Stress Relief
Impact
High effect
A- Ingredient FitB- PathwaysB EvidenceA+ Formulation Logic
Magnesium · 450 mgVitamin B6 · 10.5 mg

Magnesium may support calmer responses when magnesium intake is low, while zinc has conditional relevance in low-zinc or selected clinical anxiety settings. Their nutritional roles do not establish broad, lasting relief from everyday stress. The larger mineral amounts do not imply stronger psychological effects.

How this product is rated for Stress Relief

Ingredient fit89

The active ingredients align with the stress-related nutritional or calming roles described in the supplied information.
Goal fit
The active ingredients align with the stress-related nutritional or calming roles described in the supplied information.
Dose adequacy
Declared amounts contribute unevenly; larger quantities do not establish stronger psychological stress relief.

Pathways71

The strongest represented area is neuroinflammation and resilience, with effects still limited by the ingredients’ evidence.
Depth
The strongest represented area is neuroinflammation and resilience, with effects still limited by the ingredients’ evidence.
Breadth
The principal represented areas are neural calming, neuroinflammation and resilience. This does not establish benefits across every aspect of stress.

Evidence76

Magnesium may support calmer responses when magnesium intake is low, although lasting relief from everyday stress remains uncertain.
Evidence strength
Magnesium may support calmer responses when magnesium intake is low, although lasting relief from everyday stress remains uncertain.
Studied preparation
The evaluated preparations match the supplied references, although whole-product and lasting everyday benefits remain unestablished.

Formulation logic100

The evaluated ingredients can contribute independently or have their specified accompanying nutrients represented.
Partner coverage
The evaluated ingredients can contribute independently or have their specified accompanying nutrients represented.
Conflicts
No specified ingredient conflict was found in the supplied combination.
Effective doses
The evaluated ingredients have sufficient amounts for their assigned roles, without establishing a clinically effective dose.
Study evidence
Magnesium Supportive 13 studies
Zinc Supportive 9 studies
Testosterone Support
Impact
Highest effect
A- Ingredient FitB- PathwaysA EvidenceA+ Formulation Logic
Magnesium · 450 mgZinc · 30 mg

Zinc helps maintain testosterone when a low zinc intake or deficiency is corrected; extra zinc has not shown the same benefit when intake is adequate. Magnesium has limited hormone findings under specific exercise conditions, without a demonstrated routine testosterone benefit. Vitamin B6 has no established independent testosterone benefit from its cofactor role.

How this product is rated for Testosterone Support

Ingredient fit87

Zinc, Vitamin B6, Magnesium account for the relevant known ingredients. Their amount recognition does not establish a testosterone increase.
Goal fit
The relevant ingredient focus comes from Zinc, Vitamin B6, Magnesium.
Dose adequacy
Relevant amounts receive partial comparison recognition; this comparison does not establish a proven testosterone dose.

Pathways70

The strongest recorded connection concerns free-testosterone availability, mainly through magnesium; the supplied human findings remain limited.
Depth
The strongest recorded connection concerns free-testosterone availability, mainly through magnesium; the supplied human findings remain limited.
Breadth
One hormone pathway reaches the saved coverage threshold; the remaining pathways do not.

Evidence91

Zinc supplies the strongest relevant human support, specifically for correcting low zinc status.
Evidence strength
Zinc supplies the strongest relevant human support, specifically for correcting low zinc status.
Studied preparation
Most eligible ingredients meet the saved preparation criteria, while vitamin B6 does not meet that preparation finding.

Formulation logic100

The supplied findings identify no unmet ingredient partner or configured conflict. Amount thresholds do not prove combined hormone effects.
Partner coverage
The recognized ingredients have no unmet required partner in the supplied findings; this does not demonstrate added benefit from combining them.
Conflicts
No configured ingredient conflict was identified from the supplied facts.
Effective doses
The eligible ingredients meet the saved amount threshold, which is a comparison finding rather than proof of hormone efficacy.
Study evidence
Magnesium Disputed 5 studies
Zinc Disputed 7 studies
Fitness
Impact
High effect
B+ Ingredient FitF PathwaysB- EvidenceA+ Formulation Logic
Magnesium · 450 mg

Magnesium can help fill low intake that impairs muscle function and exercise capacity. Supplementation has not established improved performance in magnesium-replete athletes.

How this product is rated for Fitness

Ingredient fit81

The counted amounts reach the saved comparison levels; this does not establish an optimal personal dose or a sustained regimen.
Goal fit
The formula combines exercise-related ingredients with ingredients serving other purposes.
Dose adequacy
The counted amounts reach the saved comparison levels; this does not establish an optimal personal dose or a sustained regimen.

Pathways0

No direct exercise pathway receives a contribution; the nutritional finding remains distinct from demonstrated performance improvement.
Depth
No direct exercise pathway receives a contribution; the nutritional finding remains distinct from demonstrated performance improvement.
Breadth
No exercise pathway reaches the saved coverage comparison.

Evidence70

Magnesium provides the strongest saved contribution, subject to its nutritional, exercise and population limits.
Evidence strength
Magnesium provides the strongest saved contribution, subject to its nutritional, exercise and population limits.
Studied preparation
The saved findings accept the preparations with sufficient amounts; this does not establish testing of the whole formula.

Formulation logic100

All counted ingredients reach the saved minimum amount threshold, which is not proof of clinical effectiveness.
Partner coverage
The counted ingredients do not require an additional partner for the saved contribution; a combined benefit is not established.
Conflicts
No configured formulation conflict was identified.
Effective doses
All counted ingredients reach the saved minimum amount threshold, which is not proof of clinical effectiveness.
Study evidence
Magnesium Disputed 29 studies
Zinc Supportive 7 studies
Metabolism Support
Impact
High effect
A- Ingredient FitF PathwaysA+ EvidenceA+ Formulation Logic
Vitamin B6 · 10.5 mgZinc · 30 mgMagnesium · 450 mg

Magnesium, zinc and vitamin B6 support normal nutrient-dependent energy and enzyme functions. These roles do not demonstrate that supplementation increases whole-body energy expenditure when nutrient needs are met. The serving's amount contribution is separate from a demonstrated thermogenic effect, and combining the nutrients does not establish an additional metabolism boost.

How this product is rated for Metabolism Support

Ingredient fit89

Zinc contributes to the saved ingredient and amount findings. The supplied scientific context limits expectations for a direct metabolism boost.
Goal fit
The formula contains no unrelated active ingredients diluting those included in this comparison.
Dose adequacy
The included amounts reach the full comparison allowances; these are not proven thermogenic doses.

Pathways0

Normal nutrient functions remain separate from thermogenesis. No direct energy-expenditure route receives a contribution.
Depth
No direct energy-expenditure route receives a contribution from the supplied findings.
Breadth
No route meets the coverage threshold, leaving limited breadth across energy-expenditure mechanisms.

Evidence100

Zinc leads the included evidence finding. Cellular energy roles and metabolic biomarkers do not by themselves demonstrate higher whole-body energy expenditure.
Evidence strength
Zinc leads the saved evidence comparison, while its supplied findings do not establish a routine energy-expenditure boost.
Studied preparation
The included preparations are accepted for comparison; this does not establish that the product reproduces a thermogenesis trial.

Formulation logic100

No missing partner or configured conflict is identified. Meeting comparison amounts does not establish added thermogenesis from the formula.
Partner coverage
The supplied findings identify no missing partner needed by the included ingredients.
Conflicts
No configured ingredient conflict is identified in the supplied formula; this is a limited interaction check.
Effective doses
The included ingredients meet the minimum amount threshold, which does not establish an effective thermogenic dose.
Study evidence
Magnesium Supportive 61 studies
Vitamin B6 Supportive 16 studies
Zinc Supportive 12 studies

Ingredients

IngredientAmount per servingScore
Vitamin B6 (Pyridoxine Hydrochloride)
10.5 mg
Magnesium (Magnesium Aspartate)
450 mg 71
Zinc (Zinc Aspartate, Zinc Monomethionine)
30 mg 72
Adults 18–50
Report overview
B+ Active Ingredient Quality & BioavailabilityC+ Dose, Safety & Label TransparencyC Value
+6
Each serving provides a substantial 30 mg of zinc at a moderate price per serving. The zinc comes from Zinc Aspartate and Zinc Methionine; their proportions are unknown. The copper amount is unknown, so the zinc-to-copper balance is unclear.
How this ingredient is rated

Active Ingredient Quality & Bioavailability84

The zinc comes from Zinc Aspartate and Zinc Methionine; their proportions are unknown.
Zinc Form Bioavailability
The zinc comes from Zinc Aspartate and Zinc Methionine; their proportions are unknown.

Dose, Safety & Label Transparency67

The label states 30 mg of zinc per serving. The copper amount is unknown, so the zinc-to-copper balance is unclear.
Elemental Dose Transparency
The label clearly states 30 mg of zinc per serving.
Zinc Dosage Safety & Effectiveness
The 30 mg serving provides a substantial amount of zinc.
Zinc-to-Copper Mineral Balance
The copper amount is unknown, so the zinc-to-copper balance is unclear.

Value60

The price per serving is moderate.
Price Per Serving Efficiency
The price per serving is moderate.
D Active Ingredient Quality & BioavailabilityA- Dose, Safety & Label TransparencyB+ Value
+6
Each serving provides 450 mg of magnesium, a large amount. The source is magnesium aspartate. The cost per serving must be considered alongside the magnesium form.
How this ingredient is rated

Active Ingredient Quality & Bioavailability49

The source is magnesium aspartate. No branded or fully chelated magnesium claim is specified.
Magnesium Form & Absorption Potential
The source is magnesium aspartate.
Patented Materials & Chelation Quality
No branded or fully chelated magnesium claim is specified.

Dose, Safety & Label Transparency88

The label states 450 mg of magnesium per serving. A supporting nutrient is present, but its identity is not specified here.
Elemental Yield Transparency
The elemental magnesium amount is stated as 450 mg per serving.
Therapeutic Dosage Alignment
The serving provides 450 mg of magnesium, a large amount.
Synergistic Formulation Logic
A supporting nutrient is present, but its identity is not specified here.

Value80

The cost per serving must be considered alongside the magnesium form.
Price Per Elemental Quality
The cost per serving must be considered alongside the magnesium form.
Report alternatives

Sources

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

  1. 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
  2. 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
  3. 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
  4. 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
  5. 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
  6. The Effects of the AGE Inhibitor Pyridoxamine on Bone in Older Women With Type 2 Diabetes: A Randomized Clinical Trial.
    Brossfield AV; McMahon DJ; Fernando J; Omeragic B; Majeed R; Agarwal S; Sroga GE; Wang B; Vashishth D; Rubin MR · The Journal of clinical endocrinology and metabolism · 2025
    Randomized trial55 participantsBone Health forVitamin B6
  7. Dietary B vitamin intake and risk of hip fracture: the Singapore Chinese Health Study.
    Dai Z; Wang R; Ang LW; Yuan JM; Koh WP · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2014
    Cohort study63,257 participantsBone Health forVitamin B6
  8. Hip fracture patients may be vitamin B6 deficient. Controlled study of serum pyridoxal-5'-phosphate.
    Reynolds TM; Marshall PD; Brain AM · Acta orthopaedica Scandinavica · 1993
    Case-control study103 participantsBone Health forVitamin B6
  9. Degree of mineralization-related collagen crosslinking in the femoral neck cancellous bone in cases of hip fracture and controls.
    Saito M; Fujii K; Marumo K · Calcified tissue international · 2006
    Case-control study50 participantsBone Health forVitamin B6
  10. Adequate Intake and Supplementation of B Vitamins, in Particular Folic Acid, can Play a Protective Role in Bone Health.
    Rondanelli M; Tartara A; Fossari F; Vecchio V; Faliva MA; Naso M; Perna S; Nichetti M; Peroni G · Current aging science · 2022
    Narrative review35,298 participants29 studies pooledBone Health forVitamin B6
  11. Increased incidence of fractures in middle-aged and elderly men with low intakes of phosphorus and zinc.
    Elmståhl S; Gullberg B; Janzon L; Johnell O; Elmståhl B · Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 1999
    Cohort study6,576 participantsBone Health forZinc
  12. Zinc Supplementation Increases Procollagen Type 1 Amino-Terminal Propeptide in Premenarcheal Girls: A Randomized Controlled Trial.
    Berger PK; Pollock NK; Laing EM; Chertin V; Bernard PJ; Grider A; Shapses SA; Ding KH; Isales CM; Lewis RD · The Journal of nutrition · 2016
    Randomized trial147 participantsBone Health forZinc
  13. Randomized controlled trial of prenatal zinc supplementation and fetal bone growth.
    Merialdi M; Caulfield LE; Zavaleta N; Figueroa A; Costigan KA; Dominici F; Dipietro JA · The American journal of clinical nutrition · 2004
    Randomized trial242 participantsBone Health forZinc
  14. The effects of zinc supplementation on serum zinc, alkaline phosphatase activity and fracture healing of bones.
    Sadighi A; Roshan MM; Moradi A; Ostadrahimi A · Saudi medical journal · 2009
    Randomized trial60 participantsBone Health forZinc
  15. Is Zinc an Important Trace Element on Bone-Related Diseases and Complications? A Meta-analysis and Systematic Review from Serum Level, Dietary Intake, and Supplementation Aspects.
    Ceylan MN; Akdas S; Yazihan N · Biological trace element research · 2021
    Meta-analysis40 studies pooledBone Health forZinc
  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. 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