Label arithmetic · NIH DSLD 310754
BulkSupplements.com Magnesium Hydroxide: 410 mg of magnesium per 1000 mg, 250 servings
410 mg of magnesium in each 1000 mg, about 250 servings per 250 Gram. Hydroxide is 41.7% magnesium. Inside: salt per scoop, %DV check.
BulkSupplements.com Magnesium Hydroxide declares 410 mg of elemental magnesium per serving as hydroxide, which means 984 mg of magnesium hydroxide powder in one serving, compared with 1,100 mg in the largest standard capsule; that is the weight of the salt alone, before any fillers or flavours in the scoop. No US retail price matched as of 2026-11-02; 0 of the 5 hydroxide labels in this registry have a matched price. NIH DSLD 310754, label dated 2024-04-23.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 6,997 |
| orotate |
| 5,640 |
| L-threonate |
| 4,970 |
| taurate |
| 4,596 |
| lactate |
| 3,414 |
| glycerophosphate |
| 3,280 |
| glycinate |
| 2,908 |
| malate |
| 2,638 |
| aspartate |
| 2,621 |
| citrate |
| 2,537 |
| sulfate |
| 2,031 |
| chloride |
| 1,606 |
| carbonate |
| 1,422 |
| hydroxide |
| 984 |
| oxide |
| 680 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 984 mg per serving · Price: none matched · % DV: 98% vs 98%
Elemental: The magnesium itself; the rest of the compound weight is the partner molecule.
Compound: The whole salt, such as magnesium glycinate, that must physically fit in the capsule.
Size 000: The largest standard capsule, about 1,100 mg of powder at 0.8 g/mL, the top of the usual 0.6–0.8 range; size 00 holds about 730 mg and size 0 about 545 mg.
Recompute with your price
Enter the price you paid; the declared amount and servings of this label are prefilled, so the result is the cost per 100 mg of elemental magnesium for your bottle.
Same-salt comparison appears here.
How much hydroxide powder is in one scoop?
BulkSupplements.com Magnesium Hydroxide carries 984 mg of magnesium hydroxide per serving for 410 mg of elemental magnesium, against 1,100 mg in the largest standard capsule; capsule capacities do not apply to this powder.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 410 mg |
| Units per serving | Not a discrete unit as of 2026-11-02 |
| Magnesium hydroxide per serving | 984 mg |
| Magnesium hydroxide per serving | Not computable as of 2026-11-02 |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Capsule sizes do not apply |
Source · NIH DSLD 310754 · label 2024-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
BulkSupplements.com Magnesium Hydroxide files 1 magnesium line in NIH DSLD 310754; the selected primary line declares 410 mg of elemental magnesium per serving, against 0 other rows excluded from the primary amount. A salt named under another nutrient does not turn that nutrient's quantity into elemental magnesium.
measured| Filed amount | Salt or note as filed | Role |
|---|---|---|
| 410 mg | Salt not named in this row; magnesium hydroxide is taken from the label text | Primary serving |
Source · NIH DSLD 310754 · label 2024-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's hydroxide claim hold up, or could the magnesium come from another source?
The label names one magnesium form, hydroxide, resolved from the full NIH DSLD record text; capsule capacities do not apply to this form, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| Magnesium hydroxide | 41.7% | full NIH DSLD record text |
Source · NIH DSLD 310754 · label 2024-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
No US retail price is matched to this label as of 2026-11-02; 0 of 5 hydroxide labels have one, against a median of none per 100 mg among 0 ranked hydroxide offers.
computed| Rank | Label | Per 100 mg | Observed |
|---|
Source · Amazon via licensed data provider; NIH DSLD · unique ASIN × date; prices observed 2026-10-26 to 2026-11-02 · release 2026-08-10-f441aa9f · CSV · method
How many days will this bottle last at the label's own serving, and what does a day cost?
At the label's own serving, BulkSupplements.com Magnesium Hydroxide lasts 250 days: 250 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 250 Gram(s); 8.8 Ounce(s) |
| Serving size as filed | 1000 mg (about 1/3 tsp) |
| Servings per container | 250 |
| Servings per day in the directions | 1 |
| Days per bottle | 250 days |
| $ per 30 days at one label serving a day | No ranked price as of 2026-11-02 |
| $ per 30 days at 420 mg Daily Value | No ranked price as of 2026-11-02 |
Source · NIH DSLD 310754 · label 2024-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "98% Daily Value" mean here, and does it recompute?
The label declares 98% Daily Value; 410 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 98%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 98% | 420 mg | 98% |
Source · NIH DSLD 310754; 21 CFR 101.9 · label 2024-04-23 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain these other ingredients, what shell is it, and who is it filed for?
Other ingredients are not present in the filed record for BulkSupplements.com Magnesium Hydroxide as of 2026-11-02.
measured| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
| Target group | Dairy Free |
| Target group | Sugar Free |
Source · NIH DSLD 310754 · label 2024-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about hydroxide, and about side effects?
1 study in the PubMed-checked registry measured outcomes involving hydroxide; none reports a gastrointestinal outcome as of 2026-11-02. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2025 | Comparing the Bioavailability of Two Seawater-Derived Magnesium Preparations. | 40955524 |
Source · PubMed-checked study registry · registry checked 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Has this brand had FDA recalls or adverse event reports?
BulkSupplements.com has 2 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. BulkSupplements.com has FDA CAERS adverse event reports on record at brand level, as do 143 of 273 brands in this registry; openFDA states that “there is no certainty that the reported event (adverse event) was actually due to the product” and that reports “cannot be used to estimate the incidence of these events.”
measured| Recall | Date | Reason | Status |
|---|---|---|---|
| F-1827-2018 | 2018-08-22 | FDA inspection found two lots of supplements that did not declare shellfish as an ingredient on the product label; shellfish is properly declared on website. | Terminated |
| H-0619-2025 | 2025-09-24 | Finished product possibly contaminated with pathogenic Staphylococcus aureus. | Terminated |
Source · openFDA enforcement and CAERS · queried 2026-10-19 · release 2026-08-10-f441aa9f · CSV · method
Is this the same formula as another brand's, and how do their prices differ?
No other brand files the same formulation (ingredients, shell, units and rounded amount) as of 2026-11-02.
computed| Label | Brand | Price per 100 mg |
|---|---|---|
| No cross-brand match as of 2026-11-02 |
Source · NIH DSLD 310754 · label 2024-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
No other label files the same resolved salt within ±10% of this label's dose per unit as of 2026-11-02.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| No neighbour as of 2026-11-02 |
Source · NIH DSLD 310754 · label 2024-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Where does this record come from, what is missing, and how do I cite or correct it?
Every value on this page traces to NIH DSLD 310754 (label 2024-04-23, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 2 gaps remain: No US retail price matched as of 2026-11-02 (barcode X000J41BHJ); Other ingredients are not present in the filed record as of 2026-11-02. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 310754 |
| Scanned label (PDF) | Label 310754 scan |
| Label date | 2024-04-23 |
| Date entered into DSLD | 2024-04-23 |
| Barcode (UPC) as filed | X000J41BHJ |
| Label version · Package size difference, same product | NIH DSLD 253896 |
| Label version · Package size difference, same product | NIH DSLD 310753 |
| Label version · Package size difference, same product | NIH DSLD 253897 |
24 additional rows
| Field | As filed |
|---|---|
| Label version · Image difference, same product | NIH DSLD 253897 |
| Label version · Package size difference, same product | NIH DSLD 310752 |
| Label version · Package size difference, same product | NIH DSLD 253898 |
| Label version · Package size difference, same product | NIH DSLD 252673 |
| Label version · Package size difference, same product | NIH DSLD 310755 |
| Distributed exclusively by | BulkSupplements.com, Henderson, NV, US |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Brand IP Statement(s) re: (c), (TM), (SM) | BulkSupplements.com Clean & pure bulk supplements |
| FDA Disclaimer Statement | Warning: This product is not intended to diagnose, treat, cure, or prevent any disease. |
| Precautions re: All Other | Always consult a physician before taking any dietary supplement. |
| Precautions re: Children | Keep out of reach of children. |
| Formulation re: Does NOT Contain | Free of: Sugar, soy, dairy, yeast, gluten, additives |
| Suggested/Recommended/Usage/Directions | Suggested Use: As a dietary supplement, take 1000 mg (about 1/3 tsp) once daily with water, or as directed by a physician. |
| Storage | Store in a dry, cool, dark place. |
| General Statements: All Other Content | Use an accurate milligram scale. |
| Storage | Contents are sold by weight, not volume. Settling may occur. |
| General Statements: All Other Content | New |
| Formulation re: Other | Colon support Mild laxative |
| Formula re: Contains | Magnesium supplement |
| FDA Statement of Identity | Magnesium Supplement |
| Physical state | Powder |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 310754 · label 2024-04-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
6 brand pages linked below contain magnesium labels from the NIH DSLD registry snapshot dated 2026-08-10.