Label arithmetic · NIH DSLD snapshot 2026-08-10
How much magnesium is in magnesium chloride? 12.0–25.5% by weight, so 100 mg of magnesium takes 392–836 mg of chloride
12.0–25.5% of magnesium chloride is magnesium: 100 mg takes 392–836 mg of salt, 0.5–1.1 size 00 capsules. No ranked US price (Nov 2).
Magnesium chloride is 12.0–25.5% elemental magnesium, so 100 mg of magnesium needs 392–836 mg of compound, about 0.5–1.1 size 00 capsules at 0.8 g/mL powder density. No capsule label names magnesium chloride alone as of 2026-08-10, so no capsule verdict is counted. No US retail price is matched as of 2026-11-02.
computed from chemical formula
Chart data
| Displayed chart text |
|---|
| oxide |
| 60.3% |
| hydroxide |
| 41.7% |
| carbonate |
| 24.8–28.8% |
| chloride |
| 12.0–25.5% |
| sulfate |
| 9.9–20.2% |
| citrate |
| 11.3–16.2% |
| aspartate |
| 7.5–15.6% |
| malate |
| 12.6–15.5% |
| glycinate |
| 11.8–14.1% |
| glycerophosphate |
| 12.5% |
| lactate |
| 10.2–12.0% |
| taurate |
| 8.9% |
| L-threonate |
| 8.3% |
| orotate |
| 7.3% |
| gluconate |
| 5.9% |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-11-02 · chemistry 2026-10-17
Recompute for your bottle
Enter your container price, declared elemental amount and servings to calculate a price per 100 mg for this bottle.
Same-salt comparison appears here.
How much elemental magnesium is actually in 100, 200 or 400 mg of chloride?
Magnesium chloride is 12.0–25.5% elemental magnesium by mass (MgCl₂, molar mass 95.21). Magnesium chloride has a molar mass of 95.21 against magnesium's 24.305, so 12.0–25.5% of its mass is magnesium. One caveat: anhydrous 25.5%, hexahydrate 12.0%, so the figures below are given as a range wherever that matters. Every 100 mg of elemental magnesium from it needs 392–836 mg of the compound, calculated 2026-10-17.
computedThe filed salt can have more than one hydration state, so its elemental fraction is shown as a range.
Chart data
| Displayed chart text |
|---|
| chloride |
| 1,567 · 3,344 |
| oxide |
| 663 |
| Elemental magnesium | chloride required | Size 00 capsules that much powder fills |
|---|---|---|
| 100 mg | 392–836 mg | 1–2 size 00 capsules (0.5–1.1 capsules' worth of powder) |
| 200 mg | 783–1,672 mg | 2–3 size 00 capsules (1.1–2.3 capsules' worth of powder) |
| 400 mg | 1,567–3,344 mg | 3–5 size 00 capsules (2.1–4.6 capsules' worth of powder) |
anhydrous 25.5%, hexahydrate 12.0%
Source · Chemical formula and atomic masses · Calculated 2026-08-10; powder density 0.8 g/mL, the top of the usual 0.6–0.8 range · release 2026-08-10-f441aa9f · CSV · method
Estimated salt mass versus assumed capsule capacity
No capsule label names magnesium chloride alone as of 2026-08-10, so no capsule verdict is counted. The 19 labels naming this form remain in the full registry.
computed with assumptionNo capsule label naming chloride alone can be checked against capsule sizes in this snapshot.
| Mass budget verdict | Labels |
|---|---|
| Capsule labels naming this salt alone | None as of 2026-08-10 |
A size 00 capsule holds about 730 mg of powder at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range; a size 000 about 1,100 mg.
Source · NIH DSLD labels; mass balance · Recognized salt only; 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is a label called chloride really chloride, or mixed with another salt?
0 of 10 labels naming chloride also name another form as of 2026-08-10. The table counts partner names on filed labels; a named blend does not establish the elemental contribution of each salt. Open the full label list to inspect individual records.
measuredA defined molecular formula permits a calculated fraction.
| Other named form | Labels |
|---|---|
| No other named form | 10 labels reviewed |
Source · NIH DSLD magnesium rows · Labels naming this salt; 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
I need 200 mg of actual magnesium. What changes in compound weight and capsules between chloride and other forms?
For 200 mg of elemental magnesium, chloride needs 783–1,672 mg of compound, against oxide at 332 mg. Size 00 holds about 730 mg at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range. Each row uses the stated elemental fraction; hydration ambiguity stays a range, and any price comparison remains within a single salt.
computed with assumption| Salt | Elemental fraction | Compound for 200 mg | Size 00 capsules |
|---|---|---|---|
| Magnesium chloride | 12.0–25.5% | 783–1,672 mg | 2–3 size 00 |
| Magnesium glycinate | 11.8–14.1% | 1,418–1,691 mg | 2–3 size 00 |
| Magnesium citrate | 11.3–16.2% | 1,238–1,770 mg | 2–3 size 00 |
| Magnesium oxide | 60.3% | 332 mg | 1 size 00 |
| Magnesium malate | 12.6–15.5% | 1,287–1,584 mg | 2–3 size 00 |
Source · Chemical formulas and capsule capacity · Calculated 2026-08-10; powder density 0.8 g/mL, the top of the usual 0.6–0.8 range · release 2026-08-10-f441aa9f · CSV · method
What does chloride cost per 100 mg of elemental magnesium, and which label is cheapest by declared elemental magnesium?
No ranked price per 100 mg of declared elemental magnesium is available for chloride as of 2026-11-02. No observed price is on review. The 10 recognized labels remain visible in the registry even where no US retail price is matched.
computedNo US retail price is matched to this salt as of 2026-11-02.
| Rank | Label | EC100 | Match and observation |
|---|---|---|---|
| No rank | No ranked offer | No EC100 matched | Checked 2026-11-02 |
Source · Amazon via licensed data provider · Unique ASIN and observation date; prices observed 2026-10-26 to 2026-11-02 · release 2026-08-10-f441aa9f · CSV · method
What else is in chloride labels, including stearate, shells and fillers?
8 named excipients appear in the top displayed list among 10 labels naming chloride as of 2026-08-10. A listed ingredient is a filed name, not a quantified mass; open the underlying label to check context and capsule material.
measured
Chart data
| Displayed chart text |
|---|
| magnesium stearate |
| 3 |
| water |
| dicalcium phosphate |
| 2 |
| microcrystalline cellulose |
| silicon dioxide |
| stearic acid |
| calcium carbonate |
| 1 |
| cellulose |
| microcrystalline |
| Filed ingredient | Labels |
|---|---|
| magnesium stearate | 3 of 10 |
| water | 3 of 10 |
| dicalcium phosphate | 2 of 10 |
| microcrystalline cellulose | 2 of 10 |
| silicon dioxide | 2 of 10 |
| stearic acid | 2 of 10 |
| calcium carbonate | 1 of 10 |
| cellulose | 1 of 10 |
Source · NIH DSLD full label ingredient fields · Labels naming this salt; 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What did studies measure about absorption and side effects for chloride?
3 studies in our PubMed checked registry measured outcomes involving chloride as of 2026-08-10. The table names each design and measured outcome, against no pooled comparison across different study methods. No study in our registry of 16 measured side effects for chloride as of 2026-08-10.
measured3 studies in this registry measured outcomes involving chloride.
| Year | Study design and measured outcome | PubMed |
|---|---|---|
| 2005 | Eighty male Wistar rats fed a magnesium-depleted diet for three weeks, then randomised into ten groups, each receiving a different magnesium salt labelled with a stable isotope. Stable isotopes allow absorption and retention to be traced directly rather than inferred from urine, across ten salts at once , the widest head-to-head comparison in the literature. | PMID 16548135 |
| 2001 | Four commercially available US preparations given to healthy volunteers; bioavailability measured as the increment in urinary magnesium excretion. The study set out to test the claim that organic magnesium salts are more easily absorbed than inorganic ones, using urinary excretion as the read-out. | PMID 11794633 |
| 1992 | Randomized, crossover study in 12 healthy normomagnesemic subjects: a baseline period followed by three separate one-week supplementation trials at 16 mmol/dose , magnesium chloride solution, slow-release magnesium chloride tablets, and magnesium gluconate tablets , with a standardized diet during each trial. Urinary magnesium excretion in 0-4, 4-8, 8-12, and 12-24 hour collections; intraleukocyte, total serum, and ultrafiltrable serum magnesium at 0, 1, 2, 3, 4, 8, 12, and 24 hours; area-under-curve for each compartment relative to baseline for each supplement form. | PMID 1468087 |
Source · PubMed checked study registry · Registry checked 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels file chloride, and how much do they declare per serving?
10 labels name chloride; 9 have a computable elemental amount per serving, with median 100 mg, against the full list linked below. The first eight are shown here. Values are filed elemental magnesium, not an assay of the contents, in the NIH DSLD snapshot 2026-08-10.
measured
Chart data
| Displayed chart text |
|---|
| P10 18 mg |
| P50 100 mg |
| P90 169 mg |
| Label | Declared elemental per serving | NIH DSLD |
|---|---|---|
| Alta Health Products Magnesium Chloride | Not determined | 299274 |
| Complete H2O Minerals Magnesium Concentrate | 18 mg | 180155 |
| Complete H2O Minerals Magnesium Concentrate | 18 mg | 252064 |
| Complete H2O Minerals Ultimate Magnesium Concentrate | 120 mg | 252079 |
| Good State Ionic Magnesium 40,000 PPM | 100 mg | 229255 |
| NutriCology Magnesium Chloride Liquid | 67 mg | 234789 |
| Omica Organics Natural Ionic Magnesium | 333 mg | 209423 |
| Rising Mag64 Magnesium Chloride | 128 mg | 15759 |
Source · NIH DSLD on-market labels · Labels naming this salt; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Where do these numbers come from, and how do I cite or correct them?
The 10 recognized chloride labels come from the NIH DSLD snapshot 2026-08-10. Chemistry was calculated from molecular formulas on 2026-10-17; observed retail prices are checked 2026-11-02. The linked CSV carries only values displayed on this page. Cite the release and report a claim if a filed label or calculation needs correction.
computed| Layer | Source and date |
|---|---|
| Labels | NIH DSLD snapshot 2026-08-10 |
| Chemistry | Formula calculation 2026-10-17 |
| Retail | Prices observed 2026-10-26 to 2026-11-02 |
Source · NIH DSLD; chemical formulas; Amazon via licensed data provider · Release 2026-08-10-f441aa9f · release 2026-08-10-f441aa9f · CSV · method