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CALM Muscles Watermelon Flavor

4.5
★ ★ ★ ★ ★
(275 ratings)
Magnesium 300 mg
Bromelain 209 mg
Product Image
Score74
Useful magnesium and carnitine are offset by ordinary form quality, unclear bromelain potency, and weak beet dosing.
How scoring works
Powder
Quantity:6 Ounce(s) • (27 servings)
Goals:
Heart Health
General Health
Energy

Score 74

Useful magnesium and carnitine are offset by ordinary form quality, unclear bromelain potency, and weak beet dosing.
How scoring works
$23.99($0.88 per serving)
iHerb
$ 23.99
iHerb
$ 23.99
Pure Formulas
$ 23.99
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Analysis

The powder supplies 300 mg of magnesium carbonate and one gram of L-carnitine L-tartrate. Those amounts offer meaningful mineral and carnitine support for active users.

Bromelain lacks activity units, and 200 mg of beet powder is too small to provide dependable exercise support. Magnesium carbonate is functional but not among the more absorption-focused forms.

Watermelon flavor may make daily mixing easy, but the scoop and excipient details are missing. The serving cost is high for a formula with only two substantial actives.

Who is it for
  • Active adults seeking magnesium with carnitine
  • People who prefer flavored powders
  • Users comfortable with magnesium carbonate
Best for
  • Muscle-oriented mineral support
  • Carnitine intake
  • Mixable supplementation

Pros

  • Substantial magnesium amount
  • One gram of L-carnitine tartrate
  • Convenient flavored powder

Cons

  • Magnesium carbonate is ordinary
  • Bromelain activity is unknown
  • Beet powder amount is too small

Warnings

  • A 300 mg magnesium serving may cause loose stools
  • Bromelain may increase bleeding tendency with anticoagulant or antiplatelet medicines
  • People with impaired kidney function should review supplemental magnesium use

Nutrient quality

76 High impact

Magnesium and carnitine are meaningfully dosed for muscle and energy support. Magnesium carbonate, unquantified bromelain activity, and a small beet dose limit quality and breadth.

Ingredient transparency

78 High impact

All listed actives have amounts and no proprietary blend hides them. Bromelain activity, mixing directions, and inactive flavor ingredients are not provided.

Customer satisfaction

67 High impact

The aggregate rating is favorable and supported by a useful number of reviews. No specific review comments were supplied, so repeated complaints and purpose-related experiences cannot be verified.

Value for money

73 High impact

Meaningful magnesium and carnitine doses provide fair serving value. Less favorable magnesium form and limited support from bromelain and beet keep the product from leading the category.

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Goals

Heart Health
Heart Health
Impact
Highest effect
A- Goal FitA Strength of SupportC+ CoverageA+ Formula Quality
Magnesium · 300 mg

MK-7 vitamin K supports calcium placement and offers a clear arterial-health mechanism. The identified long-acting form is well aligned with cardiovascular use.

The single-active formula is narrow but supplies a meaningful, transparent amount. People using warfarin or another vitamin K antagonist need consistent vitamin K intake because abrupt changes can alter anticoagulant control.

General Health
General Health
Impact
High effect
B+ Goal FitB Strength of SupportC+ CoverageC+ Formula Quality
Magnesium · 300 mg

Magnesium provides foundational metabolic and muscle support at a meaningful amount. L-carnitine, bromelain, and beet powder add recovery-oriented pathways, though bromelain potency is not stated in activity units.

The formula is broader than standalone magnesium but still focused mainly on muscle function. Magnesium carbonate and incomplete enzyme standardization limit form quality and certainty.

Study evidence
Bromelain Supportive 11 studies
Magnesium Supportive 114 studies
Energy
Energy
Impact
High effect
B Goal FitB- Strength of SupportC+ CoverageC Formula Quality
Magnesium · 300 mg

Magnesium and L-carnitine provide a direct foundation for cellular energy and muscle function. Their disclosed amounts are substantial enough to be more than token additions.

Magnesium carbonate has weaker absorption, and the beet powder amount is too small to add convincing performance support. The focused mineral and carnitine pairing is useful, but the extra ingredients do not all carry equal weight.

Study evidence
Magnesium Supportive 4 studies
Digestive Health
Digestive Health
Impact
Moderate effect
B- Goal FitC Strength of SupportC CoverageC- Formula Quality
Bromelain · 209 mgMagnesium · 300 mg

Magnesium and bromelain support two useful digestive pathways: motility and protein breakdown. Bromelain activity units are missing, so its true enzyme strength cannot be determined.

Carnitine and beet powder mainly serve exercise and circulation rather than digestion, which weakens focus. Bromelain may increase bleeding risk with anticoagulants and can trigger reactions in people with pineapple allergy, while magnesium may cause diarrhea.

Study evidence
Bromelain Supportive 2 studies
Magnesium Supportive 50 studies
Fitness
Fitness
Impact
Moderate effect
C+ Goal FitD+ Strength of SupportC+ CoverageC+ Formula Quality
Magnesium · 300 mg

Magnesium, carnitine, bromelain, and beet powder create a plausible muscle-support blend for training and recovery. Magnesium reaches a meaningful amount, while the other actives broaden the formula toward energy metabolism, soreness, and blood flow.

Magnesium carbonate has weaker systemic absorption than better organic forms, and the 1 g carnitine plus 200 mg beet powder are modest for performance use. The blend is coherent but does not deliver strong depth across every pathway it targets.

Study evidence
Magnesium Disputed 29 studies
Cardiovascular Support
Cardiovascular Support
Impact
Moderate effect
B- Goal FitD+ Strength of SupportD+ CoverageC Formula Quality
Magnesium · 300 mgL-Carnitine · 1 Gram(s)

Magnesium provides the main cardiovascular relevance through vascular tone and normal cardiac electrical function. The elemental amount is meaningful, but carbonate has weak systemic absorption.

Carnitine and beet powder broaden the concept, yet the beet amount is too small to establish nitric-oxide support and bromelain is only loosely connected. The mixed muscle-oriented formula lacks depth in a second cardiovascular pathway.

Study evidence
Magnesium Supportive 123 studies

Ingredients

IngredientAmount per serving
Magnesium (Magnesium Carbonate)
 300 mg
L-Carnitine L-Tartrate
1 Gram(s)
Bromelain
209 mg
organic Beet powder
200 mg
Gluten Free Adults 18–50 Vegan Vegetarian
Report overview
Magnesium (Magnesium Carbonate) · 300 mg OverallScore42
F Active Ingredient Quality & BioavailabilityB+ Dose, Safety & Label TransparencyF Value

Magnesium carbonate supplies a clear therapeutic amount but has weak systemic absorption. The broader muscle-focused blend does not include a qualifying magnesium uptake cofactor. A high serving cost makes the inorganic magnesium source poor value for systemic use.

View ingredientView products
Bromelain · 209 mg OverallScore33
F Active Ingredient Quality & BioavailabilityD- Dose, Safety & Label TransparencyF Value

The powder supplies a substantial bromelain amount, but no enzyme activity units verify potency. An unprotected powder is poorly aligned with systemic muscle support, and timing guidance is missing. Cost efficiency is weak when scaled to the target bromelain amount.

View ingredientView products
Loading alternative details
83 Performance

Albion Chelated Magnesium Glycinate

Swanson Ultra
<p>Patented TRAACS magnesium bisglycinate supplies a substantial amount in a more appealing form than magnesium carbonate. It omits carnitine, bromelain, and beet powder, while digestive sensitivity remains possible.</p>
79 Performance

Liquid Magnesium Malate and Glycinate

Nature's Answer
<p>Branded magnesium malate and bisglycinate provide stronger form quality in a liquid format. Carnitine, bromelain, and beet powder are absent, and the repeated elemental amounts make the form split uncertain.</p>
83 Performance

High Potency Bromelain 3000 GDU 500 mg

Doctor's Best
<p>Highly standardized bromelain provides substantially clearer and stronger enzyme potency than the original. It supplies no magnesium, carnitine, or beet powder, and meal-timing guidance is missing.</p>
85 Budget

Magnesium Bisglycinate Chelate

Healthy Origins
<p>A much lower-cost serving replaces magnesium carbonate with well-absorbed TRAACS magnesium bisglycinate. Carnitine, bromelain, and beet powder are absent, so it is a better budget fit for magnesium alone rather than broad muscle support.</p>
91 Budget

Krebs Magnesium Potassium Complex

Nature's Way
<p>A much lower-cost serving combines magnesium lysinate and malate with potassium citrate in a clear mineral formula. It omits carnitine, bromelain, and beet powder but offers more favorable magnesium forms and strong value.</p>
86 Budget

Bromelain 2400 GDU/g - 500 mg

NOW
<p>A much lower-cost serving provides a larger, high-activity bromelain amount for focused enzyme or recovery use. Magnesium, carnitine, and beet powder are absent, and bromelain may interact with blood-thinning medicines.</p>
88 Value

Magnesium Bisglycinate Powder

NOW
<p>A practical magnesium bisglycinate amount offers better absorption potential and much lower recurring cost than magnesium carbonate. It omits the original’s carnitine, bromelain, and beet powder but delivers stronger magnesium-specific value.</p>
84 Value

Potassium + Magnesium

Nutricost
<p>Magnesium citrate with potassium citrate offers focused mineral support at a much lower recurring cost. Carnitine, bromelain, and beet powder are absent, but the two-mineral formula is simple and economical.</p>
82 Value

Bromelain 500 mg

Natural Factors
<p>A substantial pineapple-derived bromelain amount provides focused enzyme value at a much lower recurring cost. Magnesium, carnitine, and beet powder are absent, while activity units and meal timing remain unclear.</p>
Report alternatives

Sources

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

  1. 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
  2. Exercise, magnesium and immune function.
    Laires MJ; Monteiro C · Magnesium research · 2008
    Narrative reviewEnergy forMagnesium
  3. Minerals and Sarcopenia in Older Adults: An Updated Systematic Review.
    van Dronkelaar C; Fultinga M; Hummel M; Kruizenga H; Weijs PJM; Tieland M · Journal of the American Medical Directors Association · 2023
    Systematic review45 studies pooledFitness forMagnesium
  4. The effect of magnesium supplementation on muscle fitness: a meta-analysis and systematic review.
    Wang R; Chen C; Liu W; Zhou T; Xun P; He K; Chen P · Magnesium research · 2018
    Meta-analysis542 participants14 studies pooledFitness forMagnesium
  5. 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
  6. 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
  7. 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 forMagnesium
  8. 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 forMagnesium
  9. 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
  10. The role of enzyme supplementation in digestive disorders.
    Roxas M · Alternative medicine review : a journal of clinical therapeutic · 2009
    Narrative reviewDigestive Health forBromelain
  11. Effects of bromelain supplementation on disease activity and quality of life in patients with ulcerative colitis: a randomized, triple-blind, placebo-controlled study.
    Delgarm P; Mokhtare M; Ebrahimi Daryani N; Abolghasemi J; Rahideh ST · Scientific reports · 2025
    Randomized trial70 participantsDigestive Health forBromelain
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  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 Fitness 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. Dietary Magnesium May Be Protective for Aging of Bone and Skeletal Muscle in Middle and Younger Older Age Men and Women: Cross-Sectional Findings from the UK Biobank Cohort.
    Welch AA; Skinner J; Hickson M · Nutrients · 2018
    Cross-sectional study156,575 participantsFitness forMagnesium
  20. Dietary Magnesium Is Positively Associated With Skeletal Muscle Power and Indices of Muscle Mass and May Attenuate the Association Between Circulating C-Reactive Protein and Muscle Mass in Women.
    Welch AA; Kelaiditi E; Jennings A; Steves CJ; Spector TD; MacGregor A · Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2016
    Cross-sectional study2,570 participantsFitness forMagnesium
  21. Nutritional intake as a determinant of high-speed resistance and multicomponent training efficacy on strength in older women at risk of sarcopenia. A randomized clinical trial.
    Polo-Ferrero L; Recio-Rodriguez JI; González-Manzano S; Martín-Vallejo J; Barbero-Iglesias FJ; Montero-Errasquín B; Cruz-Jentoft AJ; Méndez-Sánchez R · Clinical nutrition (Edinburgh, Scotland) · 2025
    Randomized trial80 participantsFitness forMagnesium
  22. Perioperative bromelain reduces pain and swelling and improves quality of life measures after mandibular third molar surgery: a randomized, double-blind, placebo-controlled clinical trial.
    Majid OW; Al-Mashhadani BA · Journal of oral and maxillofacial surgery : official journal of the American Association of Oral and Maxillofacial Surgeons · 2014
    Randomized trial45 participantsGeneral Health forBromelain
  23. Efficacy of proteolytic enzyme bromelain on health outcomes after third molar surgery. Systematic review and meta-analysis of randomized clinical trials.
    Mendes ML; do Nascimento-Júnior EM; Reinheimer DM; Martins-Filho PR · Medicina oral, patologia oral y cirugia bucal · 2019
    Meta-analysis6 studies pooledGeneral Health forBromelain
  24. Bromelain-based enzymatic burn debridement: A systematic review of clinical studies on patient safety, efficacy and long-term outcomes.
    Shoham Y; Gasteratos K; Singer AJ; Krieger Y; Silberstein E; Goverman J · International wound journal · 2023
    Systematic review34 studies pooledGeneral Health forBromelain
  25. Placebo-controlled randomized clinical trial on the immunomodulating activities of low- and high-dose bromelain after oral administration - new evidence on the antiinflammatory mode of action of bromelain.
    Müller S; März R; Schmolz M; Drewelow B; Eschmann K; Meiser P · Phytotherapy research : PTR · 2013
    Randomized trial12 participantsGeneral Health forBromelain
  26. Bromelain reduces mild acute knee pain and improves well-being in a dose-dependent fashion in an open study of otherwise healthy adults.
    Walker AF; Bundy R; Hicks SM; Middleton RW · Phytomedicine : international journal of phytotherapy and phytopharmacology · 2003
    Randomized trial77 participantsGeneral Health forBromelain
  27. 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
  28. 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
  29. 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
  30. 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
  31. 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
  32. 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
  33. 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
  34. 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
  35. 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
  36. 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
  37. 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
  38. 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
  39. 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
  40. 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
  41. 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