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CALM Raspberry-Lemon Flavor

4.6
★ ★ ★ ★ ★
(6505 ratings)
Magnesium 325 mg
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Score70
Carbonate is less efficiently absorbed than citrate or glycinate and may have more noticeable digestive effects. Form quality is the main weakness, and the flavored format may not suit people avoiding sweetened drink mixes.
How scoring works
Liquid
Quantity:16 Liquid(s) • (113 servings)
Goals:
Heart Health
General Health
Digestive Health
Energy
Cardiovascular Support
Stress Relief

Score 70

Carbonate is less efficiently absorbed than citrate or glycinate and may have more noticeable digestive effects. Form quality is the main weakness, and the flavored format may not suit people avoiding sweetened drink mixes.
How scoring works
$19.99($0.17 per serving)
iHerb
$ 29.76
Vitacost
$ 29.76
Daily Vita
$ 29.99
Walmart
$ 19.99
iHerb
$ 29.76
Vitacost
$ 29.76
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Analysis

The flavored drink mix supplies 325 mg of magnesium as magnesium carbonate. Carbonate is less efficiently absorbed than citrate or glycinate and may have more noticeable digestive effects.

The drink format can make regular use easier for people who dislike pills and want a relaxing preparation ritual. Many servings and a low serving cost support routine use.

Form quality is the main weakness, and the flavored format may not suit people avoiding sweetened drink mixes. Choosing a dose that matches personal intake and tolerance is more useful than relying on the headline amount alone.

Who is it for
  • Adults who prefer drink mixes
  • People seeking a calming supplement routine
  • Users who tolerate magnesium carbonate
Best for
  • Pill-free magnesium use
  • Evening drink routines
  • Low-cost powdered supplementation

Pros

  • Provides a practical 325 mg elemental amount
  • Powdered drink format avoids pills
  • Many servings per container
  • Low serving cost

Cons

  • Magnesium carbonate has limited systemic absorption
  • The drink mix may favor digestive effects
  • Flavored format is less versatile than an unflavored powder

Warnings

  • The 325 mg carbonate serving may cause loose stools or abdominal discomfort, especially when consumed quickly.
  • Supplemental magnesium can accumulate with significant kidney impairment; use only with medical guidance in that situation.
  • Magnesium can reduce absorption of levothyroxine and tetracycline or quinolone antibiotics, so separate the doses as directed by a pharmacist.

Nutrient quality

72 High impact

Magnesium carbonate is an inorganic form with weaker systemic absorption than glycinate or citrate. The 325 mg elemental amount is meaningful for supplemental use.

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Ingredient transparency

81 Highest impact

The elemental amount is clearly stated and no proprietary blend hides the dose. Missing other ingredients and complete intake directions leave important label details unresolved.

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Customer satisfaction

64 Moderate impact

The supplied average rating is strong and the rating volume provides an aggregate signal. No comment-level evidence is provided to assess recurring complaints or confirm how experience matches the intended purpose.

.

Value for money

56 Moderate impact

Weak absorption or uncertain elemental yield limits effective value. The supplied active formula is not inflated by obvious low-value extras.

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Goals

Heart Health
Impact
Highest effect
A- Goal FitA Strength of SupportC+ CoverageA+ Formula Quality
Magnesium · 325 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
Impact
High effect
A Goal FitC+ Strength of SupportD+ CoverageA- Formula Quality
Magnesium · 325 mg

Magnesium provides a strong foundational-health rationale through its roles in energy, muscle, and nerve function. The disclosed amount is meaningful, but magnesium carbonate has relatively weak systemic absorption.

The powder keeps the formula focused and makes the elemental amount clear. Much of the apparent dose may remain in the digestive tract, so the form limits the practical contribution compared with citrate or chelated magnesium.

Study evidence
Magnesium Supportive 114 studies
Digestive Health
Impact
High effect
B- Goal FitB- Strength of SupportD CoverageA Formula Quality
Magnesium · 325 mg

Magnesium may support bowel motility and stool softening at the disclosed amount. The formula remains limited to one digestive pathway and does not support enzymes, fiber, the gut barrier, or the microbiome.

Magnesium carbonate is clearly identified but is less directly aligned with motility than citrate. The 325 mg supplemental amount can cause diarrhea, while impaired kidney function increases the risk of magnesium accumulation.

Study evidence
Magnesium Supportive 50 studies
Energy
Impact
High effect
B+ Goal FitC Strength of SupportD- CoverageA- Formula Quality
Magnesium · 325 mg

Magnesium supports ATP production, muscle function, and nerve signaling at a substantial label amount. The powder provides a simple way to deliver the full serving.

Magnesium carbonate has weak systemic absorption, limiting its likely contribution to cellular energy. The unabsorbed portion may remain in the digestive tract and cause loose stools in sensitive users.

Study evidence
Magnesium Supportive 4 studies
Cardiovascular Support
Impact
High effect
B- Goal FitD+ Strength of SupportD- CoverageA+ Formula Quality
Magnesium · 325 mg

Magnesium supports vascular tone and normal cardiac electrical activity, and the elemental amount is clearly stated. Magnesium carbonate has weak systemic absorption compared with better-absorbed forms.

The simple formula offers focused mineral support rather than broad cardiovascular coverage. Digestive effects may appear before the full amount provides systemic benefit.

Study evidence
Magnesium Supportive 123 studies
Stress Relief
Impact
High effect
B- Goal FitC Strength of SupportD- CoverageB+ Formula Quality
Magnesium · 325 mg

Magnesium provides foundational nervous-system support, and the clearly stated 325 mg amount is meaningful. Magnesium carbonate has weak systemic absorption, which limits confidence in its stress-relief contribution.

The focused formula does not cover adaptogenic or direct neurotransmitter pathways. Unabsorbed magnesium may cause loose stools or stomach discomfort in sensitive users.

Study evidence
Magnesium Supportive 13 studies

Ingredients

IngredientAmount per serving
Magnesium (Magnesium Carbonate)
325 mg
Gluten Free Adults 18–50 Vegan Sugar Free Vegetarian
Report overview
F Active Ingredient Quality & BioavailabilityA Dose, Safety & Label TransparencyD- Value
+2

Magnesium carbonate supplies a clear and well-aligned elemental amount at a low cost. The inorganic form has weak systemic absorption, so much of the dose may remain in the digestive tract. The simple formula contains no qualifying uptake cofactor.

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Sources

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

  1. 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
  2. Diagnosis of magnesium-induced diarrhea.
    Fine KD; Santa Ana CA; Fordtran JS · The New England journal of medicine · 1991
    Clinical trial19 participantsDigestive Health forMagnesium
  3. 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
  4. 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
  5. 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
  6. 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
  7. 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
  8. 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
  9. 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
  10. 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
  11. 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
  12. 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
  13. 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
  14. 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
  15. 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
  16. 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
  17. 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
  18. 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
  19. 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
  20. 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
  21. 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
  22. Red blood cell magnesium and chronic fatigue syndrome.
    Cox IM; Campbell MJ; Dowson D · Lancet (London, England) · 1991
    Randomized trial32 participantsEnergy forMagnesium
  23. Exercise, magnesium and immune function.
    Laires MJ; Monteiro C · Magnesium research · 2008
    Narrative reviewEnergy forMagnesium
  24. 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
  25. 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
  26. 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
  27. 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
  28. 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
  29. 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
  30. 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
  31. 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
  32. 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
  33. Effects of magnesium and potassium supplementation on insomnia and sleep hormones in patients with diabetes mellitus.
    Khalid S; Bashir S; Mehboob R; Anwar T; Ali M; Hashim M; Waseem H; Basharat S · Frontiers in endocrinology · 2024
    Randomized trial320 participantsSleep Support forMagnesium
  34. Association of magnesium intake with sleep duration and sleep quality: findings from the CARDIA study.
    Zhang Y; Chen C; Lu L; Knutson KL; Carnethon MR; Fly AD; Luo J; Haas DM; Shikany JM; Kahe K · Sleep · 2022
    Cohort study3,964 participantsSleep Support forMagnesium
  35. Lidocaine vs. magnesium: effect on analgesia after a laparoscopic cholecystectomy.
    Saadawy IM; Kaki AM; Abd El Latif AA; Abd-Elmaksoud AM; Tolba OM · Acta anaesthesiologica Scandinavica · 2010
    Randomized trial120 participantsSleep Support forMagnesium
  36. The effect of magnesium supplementation on primary insomnia in elderly: A double-blind placebo-controlled clinical trial.
    Abbasi B; Kimiagar M; Sadeghniiat K; Shirazi MM; Hedayati M; Rashidkhani B · Journal of research in medical sciences : the official journal of Isfahan University of Medical Sciences · 2013
    Randomized trial46 participantsSleep Support forMagnesium
  37. A randomized, double-blind, placebo-controlled, multicenter study assessing the efficacy of magnesium oxide monohydrate in the treatment of nocturnal leg cramps.
    Barna O; Lohoida P; Holovchenko Y; Bazylevych A; Velychko V; Hovbakh I; Bula L; Shechter M · Nutrition journal · 2021
    Randomized trial175 participantsSleep Support forMagnesium
  38. 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
  39. 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
  40. 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
  41. 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
  42. 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
  43. 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
  44. 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
  45. 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
  46. 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
  47. 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