Equal elemental amount · snapshot 2026-08-10

Magnesium chloride vs Magnesium glycinate

For 200 mg elemental magnesium, magnesium chloride requires 783–1,672 mg of compound and magnesium glycinate requires 1,418–1,691 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 11.83–14.10% for magnesium glycinate; 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 glycinate
Elemental Mg by compound mass	11.96–25.53%	11.83–14.10%
Anhydrous reference formula	MgCl₂	Mg(C₂H₄NO₂)₂
Molar mass of that reference formula	95.21 g/mol	172.42 g/mol
Composition interval	anhydrous 25.5%, hexahydrate 12.0%	bisglycinate; chelate hydration varies by supplier
Compound for 100 mg elemental Mg	392–836 mg	709–845 mg
Compound for 200 mg elemental Mg	783–1,672 mg	1,418–1,691 mg
Compound for 400 mg elemental Mg	1,567–3,344 mg	2,837–3,381 mg
Size 00 capsules for 100 mg elemental Mg	1–2 capsules at 730 mg compound fill each	1–2 capsules at 730 mg compound fill each
Size 00 capsules for 200 mg elemental Mg	2–3 capsules at 730 mg compound fill each	2–3 capsules at 730 mg compound fill each
Size 00 capsules for 400 mg elemental Mg	3–5 capsules at 730 mg compound fill each	4–5 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 glycinate: 200 mg worked example

For 200 mg elemental magnesium as magnesium glycinate, the chemistry accompanying the 2026-08-10 snapshot requires 1,418–1,691 mg of compound: 200 ÷ 0.1410 through 200 ÷ 0.1183, 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 bisglycinate; chelate hydration varies by supplier.

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 glycinate · 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 glycinate: compound mass	Magnesium glycinate: size 0	Magnesium glycinate: size 00	Magnesium glycinate: 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	177–211 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	355–423 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	532–634 mg compound	1–2 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	709–845 mg compound	2 capsules at 545 mg fill	1–2 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	887–1,057 mg compound	2 capsules at 545 mg fill	2 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	1,064–1,268 mg compound	2–3 capsules at 545 mg fill	2 capsules at 730 mg fill	1–2 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	1,241–1,479 mg compound	3 capsules at 545 mg fill	2–3 capsules at 730 mg fill	2 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	1,418–1,691 mg compound	3–4 capsules at 545 mg fill	2–3 capsules at 730 mg fill	2 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	1,596–1,902 mg compound	3–4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 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	1,773–2,113 mg compound	4 capsules at 545 mg fill	3 capsules at 730 mg fill	2 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	1,950–2,325 mg compound	4–5 capsules at 545 mg fill	3–4 capsules at 730 mg fill	2–3 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	2,128–2,536 mg compound	4–5 capsules at 545 mg fill	3–4 capsules at 730 mg fill	2–3 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	2,305–2,747 mg compound	5–6 capsules at 545 mg fill	4 capsules at 730 mg fill	3 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	2,482–2,959 mg compound	5–6 capsules at 545 mg fill	4–5 capsules at 730 mg fill	3 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	2,660–3,170 mg compound	5–6 capsules at 545 mg fill	4–5 capsules at 730 mg fill	3 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	2,837–3,381 mg compound	6–7 capsules at 545 mg fill	4–5 capsules at 730 mg fill	3–4 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	3,014–3,593 mg compound	6–7 capsules at 545 mg fill	5 capsules at 730 mg fill	3–4 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	3,191–3,804 mg compound	6–7 capsules at 545 mg fill	5–6 capsules at 730 mg fill	3–4 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	3,369–4,015 mg compound	7–8 capsules at 545 mg fill	5–6 capsules at 730 mg fill	4 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	3,546–4,227 mg compound	7–8 capsules at 545 mg fill	5–6 capsules at 730 mg fill	4 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	3,723–4,438 mg compound	7–9 capsules at 545 mg fill	6–7 capsules at 730 mg fill	4–5 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	3,901–4,649 mg compound	8–9 capsules at 545 mg fill	6–7 capsules at 730 mg fill	4–5 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	4,078–4,861 mg compound	8–9 capsules at 545 mg fill	6–7 capsules at 730 mg fill	4–5 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	4,255–5,072 mg compound	8–10 capsules at 545 mg fill	6–7 capsules at 730 mg fill	4–5 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	4,433–5,283 mg compound	9–10 capsules at 545 mg fill	7–8 capsules at 730 mg fill	5 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	4,610–5,495 mg compound	9–11 capsules at 545 mg fill	7–8 capsules at 730 mg fill	5 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	4,787–5,706 mg compound	9–11 capsules at 545 mg fill	7–8 capsules at 730 mg fill	5–6 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	4,965–5,917 mg compound	10–11 capsules at 545 mg fill	7–9 capsules at 730 mg fill	5–6 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	5,142–6,128 mg compound	10–12 capsules at 545 mg fill	8–9 capsules at 730 mg fill	5–6 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	5,319–6,340 mg compound	10–12 capsules at 545 mg fill	8–9 capsules at 730 mg fill	5–6 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	5,496–6,551 mg compound	11–13 capsules at 545 mg fill	8–9 capsules at 730 mg fill	5–6 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	5,674–6,762 mg compound	11–13 capsules at 545 mg fill	8–10 capsules at 730 mg fill	6–7 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	5,851–6,974 mg compound	11–13 capsules at 545 mg fill	9–10 capsules at 730 mg fill	6–7 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	6,028–7,185 mg compound	12–14 capsules at 545 mg fill	9–10 capsules at 730 mg fill	6–7 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	6,206–7,396 mg compound	12–14 capsules at 545 mg fill	9–11 capsules at 730 mg fill	6–7 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	6,383–7,608 mg compound	12–14 capsules at 545 mg fill	9–11 capsules at 730 mg fill	6–7 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	6,560–7,819 mg compound	13–15 capsules at 545 mg fill	9–11 capsules at 730 mg fill	6–8 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	6,738–8,030 mg compound	13–15 capsules at 545 mg fill	10–12 capsules at 730 mg fill	7–8 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	6,915–8,242 mg compound	13–16 capsules at 545 mg fill	10–12 capsules at 730 mg fill	7–8 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	7,092–8,453 mg compound	14–16 capsules at 545 mg fill	10–12 capsules at 730 mg fill	7–8 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 glycinate group has 42; 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 glycinate	126	42	16	13	13

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 glycinate has 16 of 42 audited capsule labels at or below 730 mg minimum compound mass per capsule, 13 above 730 mg but at or below 1100 mg, and 13 above 1100 mg. Its other 84 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 6 with magnesium glycinate; the combined list contains 8 unique publications, with shared records printed once.

Study-set membership · reviewed 2026-09-11
Salt	Publications	Publication years
Magnesium chloride	3	1992–2005
Magnesium glycinate	6	1995–2024

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

8 published measurements relevant to this pair

The 2026-09-11 literature review links these 8 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.

Comparative Clinical Study on Magnesium Absorption and Side Effects After Oral Intake of Microencapsulated Magnesium (MAGSHAPE™ Microcapsules) Versus Other Magnesium Sources.
Nutrients · 2024 · PMID 39770988
Design
Double-blind, randomized, cross-over clinical study in 40 healthy women and men. Participants followed a low-magnesium diet for 7 days and fasted 8 hours, then received a single oral dose of each of four products in cross-over fashion: microencapsulated magnesium (Mg-MS / MAGSHAPE), magnesium oxide (MgO), magnesium citrate (Mg-C), and magnesium bisglycinate (Mg-BG). Blood was drawn by digital puncture before dosing (0 h) and at 1, 4, and 6 hours after each product.
What it measured
Plasma magnesium concentration at 0, 1, 4, and 6 hours after oral intake of each of the four products; gastrointestinal side effects (intestinal motility, sensations of gastric heaviness) associated with each product.
Limits
Single-dose exposure per product, not chronic supplementation; sample size n=40; a specific proprietary microencapsulation technology was tested, which may not generalize to other encapsulation methods; plasma magnesium was the only absorption marker used (no urinary or tissue measurement).
The bioaccessibility and tolerability of marine-derived sources of magnesium and calcium.
Methods (San Diego, Calif.) · 2024 · PMID 38608850
Design
Two-part study. (1) In vitro digestion (INFOGEST method) comparing solubility of Aquamin-Mg (seawater-derived, 12% magnesium), a commercially available magnesium bisglycinate, and a specific branded magnesium bisglycinate (PrizMAG) during simulated gastric and intestinal digestion phases, with and without co-administered food. (2) A randomized, double-blind, placebo-controlled 12-week study in a small cohort of healthy older adults given a combined Aquamin-Mg/Aquamin-F supplement.
What it measured
In vitro mineral solubility during simulated gastric and intestinal digestion phases; adverse-event reporting and tolerability over the 12-week human study arm.
Limits
The solubility comparison was performed in vitro (simulated digestion model), not as in vivo human absorption; the human arm assessed tolerability/safety only, not comparative bioavailability; the human cohort was described only as small and limited to older adults, with no numeric sample size given in the abstract.
Dose-Dependent Absorption Profile of Different Magnesium Compounds
Biological Trace Element Research · 2020 · PMID 30761462
Design
Absorption of several magnesium compounds profiled across doses rather than at a single dose.
What it measured
Absorption is treated as dose-dependent, so a comparison made at one dose need not hold at another — which is why single-dose head-to-head results disagree.
Limits
Compound coverage and sample size vary by arm; read the paper before carrying any single figure across.
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.
Mg citrate found more bioavailable than other Mg preparations in a randomised, double-blind study
Magnesium Research · 2003 · PMID 14596323
Design
Randomised, double-blind, placebo-controlled parallel study in 46 healthy individuals, 300 mg of elemental magnesium per day, comparing an amino-acid chelate, citrate and oxide.
What it measured
Relative bioavailability of the three preparations was compared at an equal elemental dose.
Limits
46 participants, healthy, 300 mg per day; “amino-acid chelate” is a class rather than one defined compound, so the chelate arm is not a single substance.
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.
Bioavailability of magnesium diglycinate vs magnesium oxide in patients with ileal resection
JPEN: Journal of Parenteral and Enteral Nutrition · 1995 · PMID 7815675
Design
Comparison of magnesium diglycinate (a chelate) with magnesium oxide in patients who had undergone ileal resection.
What it measured
The work followed in vitro and in situ findings suggesting diglycinate is absorbed by a different route than inorganic salts, and tested that in patients with impaired absorption.
Limits
Patients after ileal resection are a specific clinical population with poor absorption to begin with; results do not transfer to people with an intact gut.
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 glycinate: trace the filed inputs

8 of 126 labels mentioning magnesium glycinate 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
Adaptogen Research Magnesium Buffered ChelateNIH DSLD 247097 · label 2021-05-22	Single salt unresolved as of 2026-09-13Capsule	2 Capsule(s)300 mg elemental magnesium per serving	No published price matched to barcode 688907 859794 as of 2026-09-13.
Adaptogen Research Magnesium Buffered ChelateNIH DSLD 247098 · label 2021-05-22	Single salt unresolved as of 2026-09-13Capsule	2 Capsule(s)300 mg elemental magnesium per serving	No published price matched to barcode 688907 859800 as of 2026-09-13.
Akasha Naturals Magnesium GlycinateNIH DSLD 313115 · label 2024-10-24	Magnesium glycinateTablet or Pill	1 Tablet(s)100 mg elemental magnesium per serving	No published price matched to NIH DSLD 313115; barcode not filed as of 2026-09-13.
Amazon Elements Chelated Magnesium 270 mgNIH DSLD 203803 · label 2019-06-24	Magnesium glycinateTablet or Pill	2 Tablet(s)270 mg elemental magnesium per serving	$21.59 per container; $0.0666 per 100 mgObserved 2026-08-31 · legacy-verified
AN Amazing Nutrition Amazing Formulas Magnesium GlycinateNIH DSLD 251824 · label 2021-08-23	Magnesium glycinatePowder	1000–2200 mg (1/4 teaspoon-slightly rounded 1/2 teaspoon)401 mg elemental magnesium per serving	No published price matched to barcode 8 10180 02849 3 as of 2026-09-13.
AOR Advanced Orthomolecular Research Advanced Advanced Magnesium ComplexNIH DSLD 214423 · label 2020-02-26	Single salt unresolved as of 2026-09-13Capsule	1 Capsule(s)Elemental amount unresolved as of 2026-09-13	No published price matched to barcode 6 24917 08333 0 as of 2026-09-13.
Approved Science Magnesium ComplexNIH DSLD 319784 · label 2024-11-22	Single salt unresolved as of 2026-09-13Capsule	1 Capsule(s)200 mg elemental magnesium per serving	No published price matched to barcode X0039PGF67 as of 2026-09-13.
aSquared Nutrition Magnesium Glycinate 400 mgNIH DSLD 295336 · label 2023-07-18	Magnesium glycinateTablet or Pill	2 Tablet(s)400 mg elemental magnesium per serving	$27.95 per container; $0.0776 per 100 mgObserved 2026-09-11 · legacy-provisional

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 11 verified magnesium glycinate 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 glycinate: its own retail sample

As of 2026-09-13, magnesium glycinate has 11 verified matches and 9 pending matches in the price set. Its verified EC100 median is $0.1088 per 100 mg elemental magnesium (n=11); pending matches are excluded from that median. Observation dates: 2026-08-10 to 2026-09-11.

Magnesium glycinate · verified observations · reviewed 2026-09-13 · n= 11

Magnesium glycinate · verified observations · reviewed 2026-09-13 · n=

KAL	Magnesium Glycinate 400NIH DSLD · Label 253226	400 mg	45	$17.39Per container · Price observed 2026-09-07, Amazon	$0.096618.00 total elemental g/container	Verified
KAL	Magnesium Glycinate 400NIH DSLD · Label 255079	400 mg	60	$16.99Per container · Price observed 2026-09-07, Amazon	$0.070824.00 total elemental g/container	Verified
KAL	Magnesium Glycinate 400NIH DSLD · Label 255081	400 mg	90	$17.39Per container · Price observed 2026-09-07, Amazon	$0.048336.00 total elemental g/container	Verified
KAL	Magnesium Glycinate 400 Natural Orange FlavorNIH DSLD · Label 255083	400 mg	30	$22.10Per container · Price observed 2026-09-07, Amazon	$0.184212.00 total elemental g/container	Verified
Pure Encapsulations	Magnesium (Glycinate)NIH DSLD · Label 205309	120 mg	180	$46.50Per container · Price observed 2026-09-07, Amazon	$0.215321.60 total elemental g/container	Verified
Pure Encapsulations	Magnesium (Glycinate)NIH DSLD · Label 219667	120 mg	90	$27.00Per container · Price observed 2026-09-07, Amazon	$0.250010.80 total elemental g/container	Verified
Solgar	Chelated MagnesiumNIH DSLD · Label 217578	400 mg	25	$26.99Per container · Price observed 2026-09-07, Amazon	$0.269910.00 total elemental g/container	Verified
Solgar	Chelated MagnesiumNIH DSLD · Label 219379	400 mg	25	$26.99Per container · Price observed 2026-09-07, Amazon	$0.269910.00 total elemental g/container	Verified
Solgar	Chelated MagnesiumNIH DSLD · Label 217587	400 mg	62	$26.99Per container · Price observed 2026-09-07, Amazon	$0.108824.80 total elemental g/container	Verified
Solgar	Chelated MagnesiumNIH DSLD · Label 239320	400 mg	62	$26.99Per container · Price observed 2026-09-07, Amazon	$0.108824.80 total elemental g/container	Verified
Amazon Elements	Chelated Magnesium 270 mgNIH DSLD · Label 203803	270 mg	120	$21.59Per container · Price observed 2026-08-31, Amazon	$0.066632.40 total elemental g/container	Verified

Magnesium glycinate · pending observations · reviewed 2026-09-13 · n= 9

These candidate retail-to-label matches remain separate from verified rows and are not included in verified medians.

Magnesium glycinate · pending observations · reviewed 2026-09-13 · n=

KAL	Magnesium Glycinate 400NIH DSLD · Label 255082	400 mg	30	$16.99Per container · Price observed 2026-08-10, Amazon	$0.141612.00 total elemental g/container	Pending verification
aSquared Nutrition	Magnesium Glycinate 400 mgNIH DSLD · Label 295336	400 mg	90	$27.95Per container · Price observed 2026-09-11, Amazon	$0.077636.00 total elemental g/container	Pending verification
BulkSupplements.com	Magnesium Glycinate PowderNIH DSLD · Label 329643	400 mg	454	$19.96Per container · Price observed 2026-09-11, Amazon	$0.0110181.60 total elemental g/container	Pending verification
Codeage	Liposomal Magnesium GlycinateNIH DSLD · Label 335374	350 mg	60	$39.99Per container · Price observed 2026-09-11, Amazon	$0.190421.00 total elemental g/container	Pending verification
Country Life	Magnesium Glycinate 400 mg Tangy Berry FlavorNIH DSLD · Label 183706	400 mg	32	$29.99Per container · Price observed 2026-09-11, Amazon	$0.234312.80 total elemental g/container	Pending verification
The Vitamin Shoppe	Magnesium Glycinate 400 mgNIH DSLD · Label 204459	400 mg	45	$19.99Per container · Price observed 2026-09-11, Amazon	$0.111118.00 total elemental g/container	Pending verification
tnvitamins	Magnesium Glycinate 300 mgNIH DSLD · Label 314544	300 mg	45	$12.99Per container · Price observed 2026-09-11, Amazon	$0.096213.50 total elemental g/container	Pending verification
Douglas Laboratories	Magnesium GlycinateNIH DSLD · Label 230442	100 mg	240	$51.00Per container · Price observed 2026-09-11, Amazon	$0.212524.00 total elemental g/container	Pending verification
Dr. Berg	Magnesium GlycinateNIH DSLD · Label 316067	400 mg	30	$29.99Per container · Price observed 2026-09-11, Amazon	$0.249912.00 total elemental g/container	Pending verification

Open the magnesium glycinate 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.