Label arithmetic · NIH DSLD 22271
SimplySupplements Magnesium 100 mg: the label lists 167 mg, salt or magnesium?
The label lists 167 mg; if that is oxide weight, it holds 101 mg of magnesium. No US price matched (Nov 2). Inside: salt weight, %DV check.
SimplySupplements Magnesium 100 mg declares magnesium without one determinable amount per 2–4 tablet(s); servings per container are not filed, Capacity audit excluded as of 2026-10-17: the filed amount may describe compound mass rather than elemental magnesium; the elemental amount is unresolved., as of 2026-11-02. No US retail price matched as of 2026-11-02; 10 of the 61 oxide labels in this registry have a matched price. NIH DSLD 22271, label dated 2013-08-23.
as filedData release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: not computable · Price: none matched · % DV: not declared
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 oxide is pressed into one tablet?
The compound mass behind this label cannot be computed as of 2026-11-02: Capacity audit excluded as of 2026-10-17: the filed amount may describe compound mass rather than elemental magnesium; the elemental amount is unresolved.. The filed amounts are listed in the next block.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | Not one amount as of 2026-11-02 |
| Units per serving | 2–4 |
| Magnesium oxide per serving | Not computable as of 2026-11-02 |
| Magnesium oxide per tablet | Not computable as of 2026-11-02 |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Not computable as of 2026-11-02 |
Source · NIH DSLD 22271 · label 2013-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
SimplySupplements Magnesium 100 mg files 1 magnesium line in NIH DSLD 22271; the selected primary line declares no single elemental amount, 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 |
|---|---|---|
| 167 mg | Salt not named in this row; magnesium oxide is taken from the label text | Primary serving |
Source · NIH DSLD 22271 · label 2013-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's oxide claim hold up, or could the magnesium come from another source?
The label names one magnesium form, oxide, 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 oxide | 60.3% | full NIH DSLD record text |
Source · NIH DSLD 22271 · label 2013-08-23; 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; 10 of 61 oxide labels have one, against a median of $0.0293 per 100 mg among 5 ranked oxide offers.
computed
Chart data
| Displayed chart text |
|---|
| n=5 |
| P25 $0.0258 |
| P75 $0.0356 |
| median $0.0293 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | Nutricost Magnesium Oxide | $0.0148 | 2026-11-02 |
| 2 | tnvitamins Magnesium Oxide 420 mg | $0.0258 | 2026-11-02 |
| 3 | Douglas Laboratories Magnesium Oxide | $0.0293 | 2026-11-02 |
| 4 | Wonder Labs Magnesium Oxide 400 | $0.0356 | 2026-11-02 |
| 5 | Carlson Magnesium Gels 400 mg | $0.0636 | 2026-11-02 |
| Median | 5 ranked oxide offers | $0.0293 | 2026-11-02 |
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?
Days per bottle cannot be computed for SimplySupplements Magnesium 100 mg as of 2026-11-02: servings per container are not filed.
computed| Measure | Value |
|---|---|
| Net contents as filed | 180 Tablet(s) |
| Serving size as filed | 2–4 Tablet(s) |
| Servings per container | Not filed as of 2026-11-02 |
| Servings per day in the directions | 1 |
| Days per bottle | Not computable as of 2026-11-02 |
| $ 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 22271 · label 2013-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "percent Daily Value" mean here, and does it recompute?
The label does not declare a percent Daily Value for magnesium as of 2026-11-02.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| No declaration as of 2026-11-02 |
Source · NIH DSLD 22271; 21 CFR 101.9 · label 2013-08-23 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
SimplySupplements Magnesium 100 mg files 2 other ingredients, including magnesium stearate (reference fraction 4.1% magnesium; no quantity filed, so it is not added to the total) and a vegetarian shell, against 30 of 61 oxide labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Microcrystalline Cellulose |
| 2 | Magnesium Stearate |
| Shell | vegetarian |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
Source · NIH DSLD 22271 · label 2013-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about oxide, and about side effects?
12 studies in the PubMed-checked registry measured outcomes involving oxide; 2 mention gastrointestinal or adverse outcomes. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2026 | Randomized, open-label study of the short-term pharmacokinetics of oral magnesium oxide in healthy volunteers. | 42091979 |
| 2024 | Comparative Clinical Study on Magnesium Absorption and Side Effects After Oral Intake of Microencapsulated Magnesium (MAGSHAPE™ Microcapsules) Versus Other Magnesium Sources. | 39770988 |
| 2022 | Effects of short-term magnesium supplementation on ionized, total magnesium and other relevant electrolytes levels. | 35041150 |
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?
SimplySupplements has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. SimplySupplements has no FDA CAERS adverse event report on record at brand level as of 2026-10-19 (143 of 273 brands in this registry have at least one CAERS report).
measured| Recall | Date | Reason | Status |
|---|---|---|---|
| No recall record as of 2026-10-19 |
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 22271 · label 2013-08-23; 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 22271 · label 2013-08-23; 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 22271 (label 2013-08-23, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 3 gaps remain: Capacity audit excluded as of 2026-10-17: the filed amount may describe compound mass rather than elemental magnesium; the elemental amount is unresolved.; No US retail price matched as of 2026-11-02 (barcode 5 060208 411362); Servings per container are not filed as of 2026-11-02. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 22271 |
| Label date | 2013-08-23 |
| Date entered into DSLD | 2013-08-23 |
| Barcode (UPC) as filed | 5 060208 411362 |
| Label version · Image difference, same product | NIH DSLD 105202 |
| Label version · Image difference, same product | NIH DSLD 22012 |
| Manufacturer | Simply Supplements, Guernsey |
| Claim category as filed | Nutrient |
21 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | All Other |
| General Statements: All Other Content | Product Information Magnesium is an essential mineral which is believed may help to support the maintenance of healthy bones. Magnesium is also thought to play a role in the body's process of calcium absorption. |
| Seals/Symbols | V |
| Suggested/Recommended/Usage/Directions | Suggested Daily Intake Take two to four tablets daily as a food supplement or as directed by a healthcare professional. |
| Storage | Store in a cool dry place. |
| Formulation re: Vegetarian/Vegan | Suitable for vegetarians. |
| General: Product/Version Code | S419 |
| Precautions re: Pregnant or Nursing or Prescription Medications | Pregnant or lactating women should consult a Doctor before using this product. |
| General Statements: All Other Content | HIGH STRENGTH |
| General Statements: All Other Content | Essential mineral for teeth and bones |
| Precautions re: Pregnant or Nursing or Prescription Medications | Important Information If you are taking any prescription medication, you have a medical condition or you have specific concerns about the suitability of our products, always consult your GP or Pharmacist prior to taking supplements. |
| Seals/Symbols | SimplySupplements(TM) |
| Precautions re: All Other | Do not use if seal is broken. |
| General Statements: All Other Content | Image is for illustration purposes only. |
| Precautions re: All Other | Food supplement: This product should not be used as a substitute for a varied diet. |
| Precautions re: All Other | Do not exceed stated dose. |
| Precautions re: Children | Keep away from children at all times. |
| General Statements: All Other Content | AutoDespatch SAVE 10% and get FREE P&P on all repeat orders by having your favourite supplements conveniently scheduled and delivered automatically with our unique AutoDespatch system. Same Day Despatch We will ensure your order is despatched on the day of receipt (when placed before 12.30pm) and that all orders placed after 12.30pm are despatched on the next working day. All sent 1st class! PriceMatch Guarantee! If you buy from us and then see the same product cheaper elsewhere we will refund the difference plus 10%! |
| Seals/Symbols | QUALITY ASSURED |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 22271 · label 2013-08-23; 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.