CALM Magnesium.

The gap this formula speaks to.

Public health figures the engine matched to this formula's ingredients. Reported by their source, cited and dated, never written by the brand.

Population figures from public health data. Context for the category, not a statement about any individual and not a claim about this product.

Every one of these is a fact the engine could ground.

Each line below was derived from this formula's own record at the time of verification. Nothing here was written by the brand, and nothing can be added that the evidence does not carry.

• Studied in people21 human studies on Magnesium back this formula, each one cited.
• A mechanism that is settledHow Vitamin C and Vitamin D work is settled pharmacology.
• Studied together, not just separatelyVitamin C and Calcium have been studied together, not only separately.
• Recent work on the recordThe most recent study on this record was published in 2026.
• Serving amount inside the studied rangeEach serving carries 290 mg of Vitamin C, inside the range the published research used.
• A stated daily maintenance amountVitamin C is here at a daily maintenance amount, which is what a daily supplement is for.
• Why this formatIt is a powder, so the serving scales to the amount you want and mixes into something you already drink.
• The exact form, describedThe label names its forms exactly: Ascorbic acid, Ergocalciferol (vitamin D2), Calcium carbonate. The record says what each one is and what it suits.
• Full label disclosureEvery ingredient on this label carries its own declared amount.
• Where it comes from and how it is madeVitamin C is made by fermentation.
• Positions this formula already qualifies forThis formula already qualifies for positions beyond the one it is sold into, on the evidence it carries.
• A position nobody is holding yetSome of those positions are ones almost nobody is selling to yet.
• Interaction screen on the recordEvery active on this label was screened against the interaction record, and the screen is published with it.

The combinations the trials actually measured.

One pairing in this formula has been studied as a combination in human trials. Each finding below is what a named study measured, cited and dated, never written by the brand.

• Calcium + MagnesiumStrength

  In a 12-month randomised, double-blind trial, 98 adults aged 50 and over drank a litre a day of either a naturally calcium- and magnesium-rich mineral water or a low-mineral water. The mineral-rich group had fewer falls at the 6-month assessment and higher appendicular muscle mass, with the minerals delivered as drinking water rather than a capsule.

  Moretti et al., 2026 (Nutrients)PMID 41683292

  Promising

Findings from trials that studied these actives as a combination. Context for how the actives were tested together, not a statement about any individual and not a claim about this product.

The size of the effect, in plain numbers.

Where a trial measured an actual number, we show it next to the claim. It is the average across the trials, never a promise about one person.

What the trials show about timing.

Time-to-effect windows the engine read from the trial record. Each is a window a named study measured, cited and dated, never written by the brand.

• Vitamin Cwithin 24 hours of a single doseMeasured within a day

  In a randomised crossover trial, 12 healthy adults consumed 101.7 mg of vitamin C as a powder, as raw fruits and vegetables, or as juice, and plasma vitamin C rose after every intake form, with plasma and urinary levels tracked over the 24 hours following the single dose.

  Choi et al., 2025 (Nutrients)PMID 41228404

  Strong
• Vitamin Dabout 3 months of daily useBuilds with daily use

  In the trial record, blood vitamin D rises for about 3 months of daily vitamin D3 and then holds at a plateau, near 69 nmol/L at 1,000 IU a day, from a starting level near 41 nmol/L.

  Vieth et al., 2001 (Am J Clin Nutr)PMID 11157326

  Early
• Calciumwithin about one to six hours of a single doseMeasured within a day

  A randomised cross-over trial in ten women of mean age 69 gave a single 500 mg dose of calcium as citrate fasting, citrate with a meal, fortified juice or a dairy product meal, with blood drawn before and at 1, 2, 4 and 6 hours. Serum ionised and total calcium increased significantly from baseline over six hours, with the rise similar after fortified juice, delayed when citrate was taken with a meal and smaller after the dairy meal. A separate double-blind cross-over trial in 25 postmenopausal women measured parathyroid hormone and a bone resorption marker 12 hours after a single calcium dose. Ten participants is a small sample, and what moved was blood chemistry, not a sensation.

  Bristow et al., 2015 (Br J Nutr)PMID 25851635

  Thomas et al., 2008 (Calcif Tissue Int)PMID 18553042

  Promising

Windows measured in the cited trials. Context for how the active behaves over time, not a statement about any individual and not a claim about this product.

How each ingredient usually behaves over time.

Five ingredients, from each one's own page.

• Vitamin CWithin hours

  Blood levels rise within hours and tissue pools fill over days. Collagen-linked changes in skin and gums build over weeks and show as tissue quality, not as a sensation.

  Its own page, the plain answer on timing ↗

• Vitamin DAbout six to twelve weeks

  25-hydroxyvitamin D climbs steadily over six to twelve weeks of daily use. That blood measurement is where the change shows up, rather than in a day-one sensation.

  Its own page, the plain answer on timing ↗

• Calcium

  No acute sensation. Parathyroid hormone responds within hours, while bone density shifts over a year or more of steady intake, so this reads on a panel and a scan.

  Its own page, the plain answer on timing ↗

• Magnesium

  A looser stool can turn up the same day at the higher end. Sleep and cramp changes usually settle in across two to four weeks, because it is refilling a body-wide store.

  Its own page, the plain answer on timing ↗

• Potassium

  Cramp steadiness and hydration can shift within a day or two of raising intake. The blood pressure side, within the normal range, reads out over four to six weeks.

  Its own page, the plain answer on timing ↗

How each ingredient usually behaves over time, from its own page on IngredientMD. General timing for the ingredient, not a measurement of this product.

Powder

It is a powder, so the serving scales to the amount you want and mixes into something you already drink.

Studied alongside this brand's other formulas

Where two of this brand's products carry actives the literature has read together, the pairing and its basis are below. The evidence word is the corpus row's own confidence, never a score.