Equal elemental amount · snapshot 2026-08-10

Magnesium chloride vs Magnesium hydroxide

For 200 mg elemental magnesium, magnesium chloride requires 783–1,672 mg of compound and magnesium hydroxide requires 480 mg, using the chemistry accompanying the 2026-08-10 label snapshot. This difference follows from the magnesium fraction of each compound. It requires no absorption-study assumption: the same elemental mass travels with a different mass of the rest of the compound.

Show the working

Same elemental amount, different compound mass

At 100, 200 and 400 mg elemental magnesium, the chemistry accompanying the 2026-08-10 snapshot uses 11.96–25.53% magnesium by mass for magnesium chloride and 41.68% for magnesium hydroxide; dividing the elemental amount by these fractions gives the compound masses below.

Formula, magnesium fraction and compound mass · snapshot context 2026-08-10
Property	Magnesium chloride	Magnesium hydroxide
Elemental Mg by compound mass	11.96–25.53%	41.68%
Anhydrous reference formula	MgCl₂	Mg(OH)₂
Molar mass of that reference formula	95.21 g/mol	58.32 g/mol
Composition interval	anhydrous 25.5%, hexahydrate 12.0%	One formula fraction used for Mg(OH)₂ in this model.
Compound for 100 mg elemental Mg	392–836 mg	240 mg
Compound for 200 mg elemental Mg	783–1,672 mg	480 mg
Compound for 400 mg elemental Mg	1,567–3,344 mg	960 mg
Size 00 capsules for 100 mg elemental Mg	1–2 capsules at 730 mg compound fill each	1 capsules at 730 mg compound fill each
Size 00 capsules for 200 mg elemental Mg	2–3 capsules at 730 mg compound fill each	1 capsules at 730 mg compound fill each
Size 00 capsules for 400 mg elemental Mg	3–5 capsules at 730 mg compound fill each	2 capsules at 730 mg compound fill each

Molar masses refer to the displayed anhydrous formulas. Hydrated or composition-ambiguous readings use the full fraction interval from the chemistry layer. Compound masses are rounded to whole milligrams; capsule counts round the unrounded mass divided by 730 mg upward at each interval endpoint.

Magnesium chloride: 200 mg worked example

For 200 mg elemental magnesium as magnesium chloride, the chemistry accompanying the 2026-08-10 snapshot requires 783–1,672 mg of compound: 200 ÷ 0.2553 through 200 ÷ 0.1196, rounded to whole milligrams.

That requires 2–3 size 00 capsules at 730 mg of compound per capsule, before other ingredients. The mass interval reflects anhydrous 25.5%, hexahydrate 12.0%.

Magnesium hydroxide: 200 mg worked example

For 200 mg elemental magnesium as magnesium hydroxide, the chemistry accompanying the 2026-08-10 snapshot requires 480 mg of compound: 200 ÷ 0.4168, rounded to whole milligrams.

That requires 1 size 00 capsules at 730 mg of compound per capsule, before other ingredients. The model uses the Mg(OH)₂ fraction throughout.

Compound mass reference in 25 mg elemental increments

40 arithmetic inputs from 25 to 1,000 mg elemental magnesium are converted below using the two salt fractions and the capsule capacities accompanying the 2026-08-10 snapshot, calculated 2026-09-13. These are mass-conversion inputs, independent of any consumption schedule.

Each compound interval divides the elemental input by the high and low magnesium fractions. Each capsule interval divides those unrounded compound masses by the listed fill capacity, then rounds upward. The three capsule sizes use 545, 730 and 1100 mg of compound per capsule respectively, before other ingredients.

Magnesium chloride and Magnesium hydroxide · 40 elemental inputs · 2026-09-13
Elemental Mg	Magnesium chloride: compound mass	Magnesium chloride: size 0	Magnesium chloride: size 00	Magnesium chloride: size 000	Magnesium hydroxide: compound mass	Magnesium hydroxide: size 0	Magnesium hydroxide: size 00	Magnesium hydroxide: size 000
25 mg elemental Mg	98–209 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill	60 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
50 mg elemental Mg	196–418 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill	120 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
75 mg elemental Mg	294–627 mg compound	1–2 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill	180 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
100 mg elemental Mg	392–836 mg compound	1–2 capsules at 545 mg fill	1–2 capsules at 730 mg fill	1 capsules at 1100 mg fill	240 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
125 mg elemental Mg	490–1,045 mg compound	1–2 capsules at 545 mg fill	1–2 capsules at 730 mg fill	1 capsules at 1100 mg fill	300 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
150 mg elemental Mg	588–1,254 mg compound	2–3 capsules at 545 mg fill	1–2 capsules at 730 mg fill	1–2 capsules at 1100 mg fill	360 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
175 mg elemental Mg	685–1,463 mg compound	2–3 capsules at 545 mg fill	1–3 capsules at 730 mg fill	1–2 capsules at 1100 mg fill	420 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
200 mg elemental Mg	783–1,672 mg compound	2–4 capsules at 545 mg fill	2–3 capsules at 730 mg fill	1–2 capsules at 1100 mg fill	480 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
225 mg elemental Mg	881–1,881 mg compound	2–4 capsules at 545 mg fill	2–3 capsules at 730 mg fill	1–2 capsules at 1100 mg fill	540 mg compound	1 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
250 mg elemental Mg	979–2,090 mg compound	2–4 capsules at 545 mg fill	2–3 capsules at 730 mg fill	1–2 capsules at 1100 mg fill	600 mg compound	2 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
275 mg elemental Mg	1,077–2,299 mg compound	2–5 capsules at 545 mg fill	2–4 capsules at 730 mg fill	1–3 capsules at 1100 mg fill	660 mg compound	2 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
300 mg elemental Mg	1,175–2,508 mg compound	3–5 capsules at 545 mg fill	2–4 capsules at 730 mg fill	2–3 capsules at 1100 mg fill	720 mg compound	2 capsules at 545 mg fill	1 capsules at 730 mg fill	1 capsules at 1100 mg fill
325 mg elemental Mg	1,273–2,717 mg compound	3–5 capsules at 545 mg fill	2–4 capsules at 730 mg fill	2–3 capsules at 1100 mg fill	780 mg compound	2 capsules at 545 mg fill	2 capsules at 730 mg fill	1 capsules at 1100 mg fill
350 mg elemental Mg	1,371–2,926 mg compound	3–6 capsules at 545 mg fill	2–5 capsules at 730 mg fill	2–3 capsules at 1100 mg fill	840 mg compound	2 capsules at 545 mg fill	2 capsules at 730 mg fill	1 capsules at 1100 mg fill
375 mg elemental Mg	1,469–3,135 mg compound	3–6 capsules at 545 mg fill	3–5 capsules at 730 mg fill	2–3 capsules at 1100 mg fill	900 mg compound	2 capsules at 545 mg fill	2 capsules at 730 mg fill	1 capsules at 1100 mg fill
400 mg elemental Mg	1,567–3,344 mg compound	3–7 capsules at 545 mg fill	3–5 capsules at 730 mg fill	2–4 capsules at 1100 mg fill	960 mg compound	2 capsules at 545 mg fill	2 capsules at 730 mg fill	1 capsules at 1100 mg fill
425 mg elemental Mg	1,665–3,554 mg compound	4–7 capsules at 545 mg fill	3–5 capsules at 730 mg fill	2–4 capsules at 1100 mg fill	1,020 mg compound	2 capsules at 545 mg fill	2 capsules at 730 mg fill	1 capsules at 1100 mg fill
450 mg elemental Mg	1,763–3,763 mg compound	4–7 capsules at 545 mg fill	3–6 capsules at 730 mg fill	2–4 capsules at 1100 mg fill	1,080 mg compound	2 capsules at 545 mg fill	2 capsules at 730 mg fill	1 capsules at 1100 mg fill
475 mg elemental Mg	1,861–3,972 mg compound	4–8 capsules at 545 mg fill	3–6 capsules at 730 mg fill	2–4 capsules at 1100 mg fill	1,140 mg compound	3 capsules at 545 mg fill	2 capsules at 730 mg fill	2 capsules at 1100 mg fill
500 mg elemental Mg	1,958–4,181 mg compound	4–8 capsules at 545 mg fill	3–6 capsules at 730 mg fill	2–4 capsules at 1100 mg fill	1,200 mg compound	3 capsules at 545 mg fill	2 capsules at 730 mg fill	2 capsules at 1100 mg fill
525 mg elemental Mg	2,056–4,390 mg compound	4–9 capsules at 545 mg fill	3–7 capsules at 730 mg fill	2–4 capsules at 1100 mg fill	1,260 mg compound	3 capsules at 545 mg fill	2 capsules at 730 mg fill	2 capsules at 1100 mg fill
550 mg elemental Mg	2,154–4,599 mg compound	4–9 capsules at 545 mg fill	3–7 capsules at 730 mg fill	2–5 capsules at 1100 mg fill	1,320 mg compound	3 capsules at 545 mg fill	2 capsules at 730 mg fill	2 capsules at 1100 mg fill
575 mg elemental Mg	2,252–4,808 mg compound	5–9 capsules at 545 mg fill	4–7 capsules at 730 mg fill	3–5 capsules at 1100 mg fill	1,380 mg compound	3 capsules at 545 mg fill	2 capsules at 730 mg fill	2 capsules at 1100 mg fill
600 mg elemental Mg	2,350–5,017 mg compound	5–10 capsules at 545 mg fill	4–7 capsules at 730 mg fill	3–5 capsules at 1100 mg fill	1,440 mg compound	3 capsules at 545 mg fill	2 capsules at 730 mg fill	2 capsules at 1100 mg fill
625 mg elemental Mg	2,448–5,226 mg compound	5–10 capsules at 545 mg fill	4–8 capsules at 730 mg fill	3–5 capsules at 1100 mg fill	1,500 mg compound	3 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
650 mg elemental Mg	2,546–5,435 mg compound	5–10 capsules at 545 mg fill	4–8 capsules at 730 mg fill	3–5 capsules at 1100 mg fill	1,560 mg compound	3 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
675 mg elemental Mg	2,644–5,644 mg compound	5–11 capsules at 545 mg fill	4–8 capsules at 730 mg fill	3–6 capsules at 1100 mg fill	1,619 mg compound	3 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
700 mg elemental Mg	2,742–5,853 mg compound	6–11 capsules at 545 mg fill	4–9 capsules at 730 mg fill	3–6 capsules at 1100 mg fill	1,679 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
725 mg elemental Mg	2,840–6,062 mg compound	6–12 capsules at 545 mg fill	4–9 capsules at 730 mg fill	3–6 capsules at 1100 mg fill	1,739 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
750 mg elemental Mg	2,938–6,271 mg compound	6–12 capsules at 545 mg fill	5–9 capsules at 730 mg fill	3–6 capsules at 1100 mg fill	1,799 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
775 mg elemental Mg	3,036–6,480 mg compound	6–12 capsules at 545 mg fill	5–9 capsules at 730 mg fill	3–6 capsules at 1100 mg fill	1,859 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
800 mg elemental Mg	3,134–6,689 mg compound	6–13 capsules at 545 mg fill	5–10 capsules at 730 mg fill	3–7 capsules at 1100 mg fill	1,919 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
825 mg elemental Mg	3,231–6,898 mg compound	6–13 capsules at 545 mg fill	5–10 capsules at 730 mg fill	3–7 capsules at 1100 mg fill	1,979 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
850 mg elemental Mg	3,329–7,107 mg compound	7–14 capsules at 545 mg fill	5–10 capsules at 730 mg fill	4–7 capsules at 1100 mg fill	2,039 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
875 mg elemental Mg	3,427–7,316 mg compound	7–14 capsules at 545 mg fill	5–11 capsules at 730 mg fill	4–7 capsules at 1100 mg fill	2,099 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
900 mg elemental Mg	3,525–7,525 mg compound	7–14 capsules at 545 mg fill	5–11 capsules at 730 mg fill	4–7 capsules at 1100 mg fill	2,159 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 capsules at 1100 mg fill
925 mg elemental Mg	3,623–7,734 mg compound	7–15 capsules at 545 mg fill	5–11 capsules at 730 mg fill	4–8 capsules at 1100 mg fill	2,219 mg compound	5 capsules at 545 mg fill	4 capsules at 730 mg fill	3 capsules at 1100 mg fill
950 mg elemental Mg	3,721–7,943 mg compound	7–15 capsules at 545 mg fill	6–11 capsules at 730 mg fill	4–8 capsules at 1100 mg fill	2,279 mg compound	5 capsules at 545 mg fill	4 capsules at 730 mg fill	3 capsules at 1100 mg fill
975 mg elemental Mg	3,819–8,152 mg compound	8–15 capsules at 545 mg fill	6–12 capsules at 730 mg fill	4–8 capsules at 1100 mg fill	2,339 mg compound	5 capsules at 545 mg fill	4 capsules at 730 mg fill	3 capsules at 1100 mg fill
1000 mg elemental Mg	3,917–8,361 mg compound	8–16 capsules at 545 mg fill	6–12 capsules at 730 mg fill	4–8 capsules at 1100 mg fill	2,399 mg compound	5 capsules at 545 mg fill	4 capsules at 730 mg fill	3 capsules at 1100 mg fill

A whole capsule count describes the minimum number of modelled containers needed to hold compound mass. It does not establish the dimensions, packing density or excipient content of a retail product. The ingredient list and serving statement on each linked record supply the product-specific context.

Declarations against capacity

How each salt's capsule labels distribute

In the 2026-08-10 snapshot, the magnesium chloride form group has 0 audited capsule labels and the magnesium hydroxide group has 1; their distributions below use the mass-budget counts stored for each form, at powder density 0.6–0.8 g/mL.

Capsule mass budgets within each form group · 2026-08-10
Salt group	All labels	Audited capsules	Fits 0/00	Needs 000	Exceeds 000
Magnesium chloride	19	0	0	0	0
Magnesium hydroxide	10	1	1	0	0

At 2026-08-10, magnesium chloride has 0 of 0 audited capsule labels at or below 730 mg minimum compound mass per capsule, 0 above 730 mg but at or below 1100 mg, and 0 above 1100 mg. Its other 19 labels have no capsule verdict in this group, either because they are not classified as capsules or because a mass budget is unavailable.

At 2026-08-10, magnesium hydroxide has 1 of 1 audited capsule labels at or below 730 mg minimum compound mass per capsule, 0 above 730 mg but at or below 1100 mg, and 0 above 1100 mg. Its other 9 labels have no capsule verdict in this group, either because they are not classified as capsules or because a mass budget is unavailable.

The audit divides a label's elemental amount by its assigned salt fraction and serving-unit count. It uses the highest fraction, hence the smallest required mass. A hydration interval can move a nominally fitting label into a larger size at its high-mass end. A result exceeding 000 means the assigned single salt exceeds this fill model even at the low-mass end.

Form groups include names in extracted primary rows, resolved salts and full-record salt mentions, and can overlap; a capsule verdict requires a single assigned salt matching this group. These are counts of label declarations, with the capsule model allocating the fill to the compound. Inspect individual serving statements and assigned salts in the audit register and the linked form pages.

Literature coverage

Which measurements are attached to these salts?

As of the literature review dated 2026-09-11, the supplied study collection associates 3 publications with magnesium chloride and 1 with magnesium hydroxide; the combined list contains 4 unique publications, with shared records printed once.

Study-set membership · reviewed 2026-09-11
Salt	Publications	Publication years
Magnesium chloride	3	1992–2005
Magnesium hydroxide	1	2025–2025

Membership means that at least one selected salt appears in the study's recorded coverage; it does not mean every paper directly compares this exact pair. In particular, an amino-acid-chelate arm does not establish a chemically defined bisglycinate preparation. Each record below retains its actual design, population, read-out and limits.

Published measurements · peer-reviewed sources

4 published measurements relevant to this pair

The 2026-09-11 literature review links these 4 publications, ordered newest first; study outcomes remain attached to their own experimental conditions.

These entries report what each study measured and on whom. They are not advice, not a ranking, and not a claim about any product on this site. Every reference links to its PubMed record so the original can be read in full.

Comparing the Bioavailability of Two Seawater-Derived Magnesium Preparations.
Journal of medicinal food · 2025 · PMID 40955524
Design
Double-blind, randomized, three-arm crossover study in 20 healthy young men and women: placebo (maltodextrin), seawater-derived magnesium citrate (Aquamin-Mg, minimum 10% elemental magnesium), and seawater-derived magnesium hydroxide (Aquamin-MgTg, minimum 33% elemental magnesium). Total magnesium doses were standardized to the RDA for elemental magnesium.
What it measured
Incremental 18-hour urinary magnesium excretion as the relative-bioavailability marker; serum magnesium concentration at 1 and 2 hours post-ingestion (colorimetric assay, run in triplicate).
Limits
Small sample (n=20); healthy young adults only, not a magnesium-deficient or older population; only two seawater-derived preparations plus placebo were tested, no head-to-head comparison against standard magnesium citrate/oxide/glycinate salts; short observation window (18 h urine, 2 h serum).
Study of magnesium bioavailability from ten organic and inorganic Mg salts in Mg-depleted rats using a stable isotope approach
Magnesium Research · 2005 · PMID 16548135
Design
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.
What it measured
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.
Limits
Rats, not people, and magnesium-depleted rats at that: depletion itself raises absorption. The breadth of the comparison is its value; the species is its limit.
Bioavailability of US commercial magnesium preparations
Magnesium Research · 2001 · PMID 11794633
Design
Four commercially available US preparations given to healthy volunteers; bioavailability measured as the increment in urinary magnesium excretion.
What it measured
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.
Limits
Healthy volunteers, small sample, urinary excretion as a proxy for absorption rather than a direct measurement of retention.
Blood and urinary magnesium kinetics after oral magnesium supplements.
Clinical therapeutics · 1992 · PMID 1468087
Design
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.
What it measured
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.
Limits
Very small sample (n=12); only two chemical forms tested (chloride in two formulations, plus gluconate); short trial duration per arm (24 hours, with weekly crossover intervals); normomagnesemic (not magnesium-deficient) subjects only.

Magnesium chloride: trace the filed inputs

8 of 19 labels mentioning magnesium chloride are shown in brand order from the supplied NIH DSLD records, calculated 2026-09-13. Salt mentions can overlap; only records assigned this single salt enter its capsule audit above.

Filed labels in brand and product order · 8 labels · calculated 2026-09-13
Brand / label	Salt / physical state	Filed serving	Observed item price / EC100
Alta Health Products Magnesium ChlorideNIH DSLD 299274 · label 2023-11-22	Magnesium chlorideTablet or Pill	1–3 Tablet(s)Elemental amount unresolved as of 2026-09-13	No published price matched to barcode 0 76920 00060 4 as of 2026-09-13.
Complete H2O Minerals Magnesium ConcentrateNIH DSLD 180155 · label 2018-08-31	Magnesium chlorideLiquid	0.33–1 Tbsp (5-15mL)18 mg elemental magnesium per serving	No published price matched to barcode 1 88671 00042 7 as of 2026-09-13.
Complete H2O Minerals Magnesium ConcentrateNIH DSLD 252064 · label 2021-07-27	Magnesium chlorideLiquid	15 mL (1 Tbsp.)18 mg elemental magnesium per serving	No published price matched to barcode 1 88671 00014 4 as of 2026-09-13.
Complete H2O Minerals Ultimate Magnesium ConcentrateNIH DSLD 252079 · label 2021-07-27	Magnesium chlorideLiquid	1 mL (25 drops)120 mg elemental magnesium per serving	No published price matched to barcode 8 52670 00617 8 as of 2026-09-13.
Douglas Laboratories Magnesium Aspartate 2XNIH DSLD 30655 · label 2014-02-26	Single salt unresolved as of 2026-09-13Tablet or Pill	1 Tablet(s)200 mg elemental magnesium per serving	No published price matched to barcode 3 10539 01313 7 as of 2026-09-13.
Douglas Laboratories Magnesium/Potassium ComplexNIH DSLD 26827 · label 2013-10-25	Single salt unresolved as of 2026-09-13Capsule	1 Capsule(s)90 mg elemental magnesium per serving	No published price matched to barcode 3 10539 71400 3 as of 2026-09-13.
Douglas Laboratories Magnesix Magnesium And B-6NIH DSLD 26807 · label 2013-10-25	Magnesium oxideTablet or Pill	1 Tablet(s)50 mg elemental magnesium per serving	$11.50 per container; $0.2300 per 100 mgObserved 2026-09-07 · legacy-verified
Good State Ionic Magnesium 40,000 PPMNIH DSLD 229255 · label 2020-07-23	Magnesium chlorideLiquid	1.25–2.5 mL (1/4-1/2 cap)100 mg elemental magnesium per serving	No published price matched to barcode 8 57515 00312 1 as of 2026-09-13.

Open the salt index and linked records to inspect ingredient lists, the source of the assigned salt and dated gaps in price matching.

Magnesium hydroxide: trace the filed inputs

8 of 10 labels mentioning magnesium hydroxide are shown in brand order from the supplied NIH DSLD records, calculated 2026-09-13. Salt mentions can overlap; only records assigned this single salt enter its capsule audit above.

Filed labels in brand and product order · 8 labels · calculated 2026-09-13
Brand / label	Salt / physical state	Filed serving	Observed item price / EC100
Allergy Research Group Magnesium Malate ForteNIH DSLD 233224 · label 2020-08-23	Single salt unresolved as of 2026-09-13Tablet or Pill	1–2 Tablet(s)124 mg elemental magnesium per serving	No published price matched to barcode 7 13947 70740 5 as of 2026-09-13.
Allergy Research Group Magnesium Malate ForteNIH DSLD 304253 · label 2023-12-14	Single salt unresolved as of 2026-09-13Tablet or Pill	1–2 Tablet(s)124 mg elemental magnesium per serving	No published price matched to barcode 7 13947 70740 5 as of 2026-09-13.
BulkSupplements.com Magnesium HydroxideNIH DSLD 310752 · label 2024-03-22	Magnesium hydroxidePowder	1000 mg (about 1/3 tsp)410 mg elemental magnesium per serving	No published price matched to barcode X000J41BKL as of 2026-09-13.
BulkSupplements.com Magnesium HydroxideNIH DSLD 310753 · label 2024-03-22	Magnesium hydroxidePowder	1000 mg (about 1/3 tsp)410 mg elemental magnesium per serving	No published price matched to barcode X0019L9FS3 as of 2026-09-13.
BulkSupplements.com Magnesium HydroxideNIH DSLD 310754 · label 2024-04-23	Magnesium hydroxidePowder	1000 mg (about 1/3 tsp)410 mg elemental magnesium per serving	No published price matched to barcode X000J41BHJ as of 2026-09-13.
Douglas Laboratories Malic Acid + MagnesiumNIH DSLD 232010 · label 2020-08-23	Magnesium hydroxideTablet or Pill	1 Tablet(s)86 mg elemental magnesium per serving	No published price matched to barcode 3 10539 00341 1 as of 2026-09-13.
Irwin Naturals Magnesium + AshwagandhaNIH DSLD 323288 · label 2025-02-23	Magnesium hydroxideSoftgel Capsule	3 Liquid Soft-Gel(s)150 mg elemental magnesium per serving	No published price matched to barcode 8 40081 40432 4 as of 2026-09-13.
NutriCology Magnesium Malate ForteNIH DSLD 235240 · label 2020-09-25	Single salt unresolved as of 2026-09-13Capsule	1–2 Tablet(s)124 mg elemental magnesium per serving	No published price matched to barcode 7 13947 50740 1 as of 2026-09-13.

Open the salt index and linked records to inspect ingredient lists, the source of the assigned salt and dated gaps in price matching.

Retail observations · after chemistry and evidence

Price observations within each salt

As of 2026-09-13, the published price set contains 0 verified magnesium chloride matches and 0 verified magnesium hydroxide matches. Each table below contains one salt and its own sample size; verified medians describe only that salt's verified rows.

EC100 = container price ÷ (declared elemental mg per serving × servings per container ÷ 100). It normalizes the container's elemental amount. The observations use one-time item prices, without coupons or subscriptions and excluding shipping. The tables retain the two salts' page order; sorting operates inside an individual salt table.

Magnesium chloride: its own retail sample

As of 2026-09-13, magnesium chloride has 0 verified matches and 0 pending matches in the price set. No verified median is available as of 2026-09-13. Observation dates: No published observations as of 2026-09-13.

0 verified retail matches are published for magnesium chloride as of 2026-09-13.

There are 0 pending price matches for magnesium chloride as of 2026-09-13.

Open the magnesium chloride label group →

Magnesium hydroxide: its own retail sample

As of 2026-09-13, magnesium hydroxide has 0 verified matches and 0 pending matches in the price set. No verified median is available as of 2026-09-13. Observation dates: No published observations as of 2026-09-13.

0 verified retail matches are published for magnesium hydroxide as of 2026-09-13.

There are 0 pending price matches for magnesium hydroxide as of 2026-09-13.

Open the magnesium hydroxide label group →

To reproduce a container calculation, use the elemental cost calculator and its static mass tables. The magnesium collection abstract connects each salt group to the label corpus; the literature collection puts the cited measurements in their broader study context.