Equal elemental amount · snapshot 2026-08-10
For 200 mg elemental magnesium, magnesium glycerophosphate requires 1,600 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
At 100, 200 and 400 mg elemental magnesium, the chemistry accompanying the 2026-08-10 snapshot uses 12.50% magnesium by mass for magnesium glycerophosphate and 41.68% for magnesium hydroxide; dividing the elemental amount by these fractions gives the compound masses below.
| Property | Magnesium glycerophosphate | Magnesium hydroxide |
|---|---|---|
| Elemental Mg by compound mass | 12.50% | 41.68% |
| Anhydrous reference formula | MgC₃H₇O₆P | Mg(OH)₂ |
| Molar mass of that reference formula | 194.36 g/mol | 58.32 g/mol |
| Composition interval | One formula fraction used for MgC₃H₇O₆P in this model. | One formula fraction used for Mg(OH)₂ in this model. |
| Compound for 100 mg elemental Mg | 800 mg | 240 mg |
| Compound for 200 mg elemental Mg | 1,600 mg | 480 mg |
| Compound for 400 mg elemental Mg | 3,200 mg | 960 mg |
| Size 00 capsules for 100 mg elemental Mg | 2 capsules at 730 mg compound fill each | 1 capsule at 730 mg compound fill each |
| Size 00 capsules for 200 mg elemental Mg | 3 capsules at 730 mg compound fill each | 1 capsule at 730 mg compound fill each |
| Size 00 capsules for 400 mg elemental Mg | 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.
For 200 mg elemental magnesium as magnesium glycerophosphate, the chemistry accompanying the 2026-08-10 snapshot requires 1,600 mg of compound: 200 ÷ 0.1250, rounded to whole milligrams.
That requires 3 size 00 capsules at 730 mg of compound per capsule, before other ingredients. The model uses the MgC₃H₇O₆P fraction throughout.
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.
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 2026-10-17. 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.
| Elemental Mg | Magnesium glycerophosphate: compound mass | Magnesium glycerophosphate: size 0 | Magnesium glycerophosphate: size 00 | Magnesium glycerophosphate: size 000 | Magnesium hydroxide: compound mass | Magnesium hydroxide: size 0 | Magnesium hydroxide: size 00 | Magnesium hydroxide: size 000 |
|---|---|---|---|---|---|---|---|---|
| 25 mg elemental Mg | 200 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill | 60 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 50 mg elemental Mg | 400 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill | 120 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 75 mg elemental Mg | 600 mg compound | 2 capsules at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill | 180 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 100 mg elemental Mg | 800 mg compound | 2 capsules at 545 mg fill | 2 capsules at 730 mg fill | 1 capsule at 1100 mg fill | 240 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 125 mg elemental Mg | 1,000 mg compound | 2 capsules at 545 mg fill | 2 capsules at 730 mg fill | 1 capsule at 1100 mg fill | 300 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 150 mg elemental Mg | 1,200 mg compound | 3 capsules at 545 mg fill | 2 capsules at 730 mg fill | 2 capsules at 1100 mg fill | 360 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 175 mg elemental Mg | 1,400 mg compound | 3 capsules at 545 mg fill | 2 capsules at 730 mg fill | 2 capsules at 1100 mg fill | 420 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 200 mg elemental Mg | 1,600 mg compound | 3 capsules at 545 mg fill | 3 capsules at 730 mg fill | 2 capsules at 1100 mg fill | 480 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 225 mg elemental Mg | 1,800 mg compound | 4 capsules at 545 mg fill | 3 capsules at 730 mg fill | 2 capsules at 1100 mg fill | 540 mg compound | 1 capsule at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 250 mg elemental Mg | 2,000 mg compound | 4 capsules at 545 mg fill | 3 capsules at 730 mg fill | 2 capsules at 1100 mg fill | 600 mg compound | 2 capsules at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 275 mg elemental Mg | 2,200 mg compound | 5 capsules at 545 mg fill | 4 capsules at 730 mg fill | 2 capsules at 1100 mg fill | 660 mg compound | 2 capsules at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 300 mg elemental Mg | 2,400 mg compound | 5 capsules at 545 mg fill | 4 capsules at 730 mg fill | 3 capsules at 1100 mg fill | 720 mg compound | 2 capsules at 545 mg fill | 1 capsule at 730 mg fill | 1 capsule at 1100 mg fill |
| 325 mg elemental Mg | 2,600 mg compound | 5 capsules at 545 mg fill | 4 capsules at 730 mg fill | 3 capsules at 1100 mg fill | 780 mg compound | 2 capsules at 545 mg fill | 2 capsules at 730 mg fill | 1 capsule at 1100 mg fill |
| 350 mg elemental Mg | 2,800 mg compound | 6 capsules at 545 mg fill | 4 capsules at 730 mg fill | 3 capsules at 1100 mg fill | 840 mg compound | 2 capsules at 545 mg fill | 2 capsules at 730 mg fill | 1 capsule at 1100 mg fill |
| 375 mg elemental Mg | 3,000 mg compound | 6 capsules at 545 mg fill | 5 capsules at 730 mg fill | 3 capsules at 1100 mg fill | 900 mg compound | 2 capsules at 545 mg fill | 2 capsules at 730 mg fill | 1 capsule at 1100 mg fill |
| 400 mg elemental Mg | 3,200 mg compound | 6 capsules at 545 mg fill | 5 capsules at 730 mg fill | 3 capsules at 1100 mg fill | 960 mg compound | 2 capsules at 545 mg fill | 2 capsules at 730 mg fill | 1 capsule at 1100 mg fill |
| 425 mg elemental Mg | 3,400 mg compound | 7 capsules at 545 mg fill | 5 capsules at 730 mg fill | 4 capsules at 1100 mg fill | 1,020 mg compound | 2 capsules at 545 mg fill | 2 capsules at 730 mg fill | 1 capsule at 1100 mg fill |
| 450 mg elemental Mg | 3,600 mg compound | 7 capsules at 545 mg fill | 5 capsules at 730 mg fill | 4 capsules at 1100 mg fill | 1,080 mg compound | 2 capsules at 545 mg fill | 2 capsules at 730 mg fill | 1 capsule at 1100 mg fill |
| 475 mg elemental Mg | 3,800 mg compound | 7 capsules at 545 mg fill | 6 capsules at 730 mg fill | 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 | 4,000 mg compound | 8 capsules at 545 mg fill | 6 capsules at 730 mg fill | 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 | 4,200 mg compound | 8 capsules at 545 mg fill | 6 capsules at 730 mg fill | 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 | 4,400 mg compound | 9 capsules at 545 mg fill | 7 capsules at 730 mg fill | 4 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 | 4,600 mg compound | 9 capsules at 545 mg fill | 7 capsules at 730 mg fill | 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 | 4,800 mg compound | 9 capsules at 545 mg fill | 7 capsules at 730 mg fill | 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 | 5,000 mg compound | 10 capsules at 545 mg fill | 7 capsules at 730 mg fill | 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 | 5,200 mg compound | 10 capsules at 545 mg fill | 8 capsules at 730 mg fill | 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 | 5,400 mg compound | 10 capsules at 545 mg fill | 8 capsules at 730 mg fill | 5 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 | 5,600 mg compound | 11 capsules at 545 mg fill | 8 capsules at 730 mg fill | 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 | 5,800 mg compound | 11 capsules at 545 mg fill | 8 capsules at 730 mg fill | 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 | 6,000 mg compound | 12 capsules at 545 mg fill | 9 capsules at 730 mg fill | 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 | 6,200 mg compound | 12 capsules at 545 mg fill | 9 capsules at 730 mg fill | 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 | 6,400 mg compound | 12 capsules at 545 mg fill | 9 capsules at 730 mg fill | 6 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 | 6,600 mg compound | 13 capsules at 545 mg fill | 10 capsules at 730 mg fill | 6 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 | 6,800 mg compound | 13 capsules at 545 mg fill | 10 capsules at 730 mg fill | 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 | 7,000 mg compound | 13 capsules at 545 mg fill | 10 capsules at 730 mg fill | 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 | 7,200 mg compound | 14 capsules at 545 mg fill | 10 capsules at 730 mg fill | 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 | 7,400 mg compound | 14 capsules at 545 mg fill | 11 capsules at 730 mg fill | 7 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 | 7,600 mg compound | 14 capsules at 545 mg fill | 11 capsules at 730 mg fill | 7 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 | 7,800 mg compound | 15 capsules at 545 mg fill | 11 capsules at 730 mg fill | 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 | 8,000 mg compound | 15 capsules at 545 mg fill | 11 capsules at 730 mg fill | 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
In the 2026-08-10 snapshot, the magnesium glycerophosphate form group has 0 audited capsule labels and the magnesium hydroxide group has 0; their distributions below use the mass-budget counts stored for each form, at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range.
| Salt group | All labels | Audited capsules | Fits 0/00 | Needs 000 | Exceeds 000 |
|---|---|---|---|---|---|
| Magnesium glycerophosphate | 0 | 0 | 0 | 0 | 0 |
| Magnesium hydroxide | 10 | 0 | 0 | 0 | 0 |
No US label in the NIH DSLD snapshot 2026-08-10 names magnesium glycerophosphate, so no capsule verdict is counted for it; the compound mass above is pure chemistry.
At 2026-08-10, none of the 10 labels naming magnesium hydroxide is a capsule that names it alone with one declared amount, so no capsule verdict is counted for it.
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
As of the literature review dated 2026-09-11, the supplied study collection associates 0 publications with magnesium glycerophosphate and 1 with magnesium hydroxide; the combined list contains 1 unique publications, with shared records printed once.
| Salt | Publications | Publication years |
|---|---|---|
| Magnesium glycerophosphate | 0 | No studies mapped as of 2026-09-11 |
| 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
The 2026-09-11 literature review links these 1 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.
8 of 10 labels mentioning magnesium hydroxide are shown in brand order from the supplied NIH DSLD records, calculated 2026-10-17. Salt mentions can overlap; only records assigned this single salt enter its capsule audit above.
| 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 2026-10-17Tablet or Pill | 1–2 Tablet(s)124 mg elemental magnesium per serving | No published price matched to barcode 7 13947 70740 5 as of 2026-10-17. |
| Allergy Research Group Magnesium Malate ForteNIH DSLD 304253 · label 2023-12-14 | Single salt unresolved as of 2026-10-17Tablet or Pill | 1–2 Tablet(s)124 mg elemental magnesium per serving | No published price matched to barcode 7 13947 70740 5 as of 2026-10-17. |
| 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 2026-10-17. |
| 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 2026-10-17. |
| 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 2026-10-17. |
| 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 2026-10-17. |
| Irwin Naturals Magnesium + AshwagandhaNIH DSLD 323288 · label 2025-02-23 | Single salt unresolved as of 2026-10-17Softgel Capsule | 3 Liquid Soft-Gel(s)150 mg elemental magnesium per serving | No published price matched to barcode 8 40081 40432 4 as of 2026-10-17. |
| NutriCology Magnesium Malate ForteNIH DSLD 235240 · label 2020-09-25 | Single salt unresolved as of 2026-10-17Capsule | 1–2 Tablet(s)124 mg elemental magnesium per serving | No published price matched to barcode 7 13947 50740 1 as of 2026-10-17. |
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
As of 2026-10-17, the published price set contains 0 verified magnesium glycerophosphate 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.
As of 2026-10-17, magnesium glycerophosphate has 0 verified matches and 0 pending matches in the price set. No verified median is available as of 2026-10-17. Observation dates: No published observations as of 2026-10-17.
0 verified retail matches are published for magnesium glycerophosphate as of 2026-10-17.
There are 0 pending price matches for magnesium glycerophosphate as of 2026-10-17.
As of 2026-10-17, magnesium hydroxide has 0 verified matches and 0 pending matches in the price set. No verified median is available as of 2026-10-17. Observation dates: No published observations as of 2026-10-17.
0 verified retail matches are published for magnesium hydroxide as of 2026-10-17.
There are 0 pending price matches for magnesium hydroxide as of 2026-10-17.
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.