Label arithmetic · NIH DSLD 327131
Dr. Mercola Magnesium Advanced: 48 mg of magnesium per capsule, 3 capsules a day
48 mg of magnesium per capsule; the label's 3 capsules a day give 145 mg. No US price matched (Nov 2). Inside: salt weight, capsule size.
Dr. Mercola Magnesium Advanced declares 145 mg of elemental magnesium per serving as l-threonate, which needs 586 mg of magnesium l-threonate in each capsule, against 730 mg in a size 00 capsule at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range: it needs size 00 or larger. Price observed 2026-09-21; pack or dose match under review, so no cost per 100 mg is shown. NIH DSLD 327131, label dated 2025-03-25.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| 545 mg |
| 730 mg |
| 1,100 mg |
| 586 mg of l-threonate per capsule |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · this offer's price observed 2026-09-21 · latest price observation 2026-11-02 · chemistry 2026-10-17
Mass: 586 mg per capsule · Price: on review · % DV: 35% vs 35%
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.
Will 145 mg of l-threonate actually fit in one capsule, or do I need more than one?
Estimated salt mass versus assumed capsule capacity: Dr. Mercola Magnesium Advanced implies 586 mg of magnesium l-threonate in each capsule to deliver 145 mg of elemental magnesium, against 1,100 mg in the largest standard capsule (size 000) at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range. Verdict: needs size 00, read at the most favourable hydration and the most units per serving.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 145 mg |
| Units per serving | 3 |
| Magnesium l-threonate per serving | 1,758 mg |
| Magnesium l-threonate per capsule | 586 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Needs size 00 |
Source · NIH DSLD 327131 · label 2025-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does the label's own text add up on magnesium?
The label's ingredient rows list 2,000 mg of magnesium l-threonate and 145 mg of magnesium: 145 mg of magnesium from 2,000 mg of magnesium l-threonate is 7.2% magnesium, against the 8.3–8.3% that magnesium l-threonate can carry, so the label's numbers agree with its salt.
computed| Measure | Value |
|---|---|
| Ingredient rows (NIH DSLD) | 2,000 mg magnesium l-threonate · 145 mg magnesium |
| Implied magnesium share | 7.2% |
| Most magnesium l-threonate can carry | 8.3% |
Source · NIH DSLD 327131 label text · snapshot 2026-08-10; salt fractions from the chemistry model · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Dr. Mercola Magnesium Advanced files 2 magnesium lines in NIH DSLD 327131; the selected primary line declares 145 mg of elemental magnesium per serving, against 1 other row excluded from the primary amount. A salt named under another nutrient does not turn that nutrient's quantity into elemental magnesium.
computed with assumption| Filed amount | Salt or note as filed | Role |
|---|---|---|
| 145 mg | threonate · Magnesium (Form: from Magnesium L-Threonate) | Primary serving |
| 2,000 mg | Salt not named in this row as of 2026-11-02 | Excluded from the primary amount |
If 2,000 mg were the compound mass rather than the element, the elemental amount would be about 165 mg (8.3% of it), computed with a stated assumption.
Source · NIH DSLD 327131 · label 2025-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's l-threonate claim hold up, or could the magnesium come from another source?
The label names one magnesium form, l-threonate, resolved from the filed magnesium line; at that salt the declaration is within the assumed size 000 capacity at powder density 0.8 g/mL, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| Magnesium L-threonate | 8.3% | filed magnesium line |
Source · NIH DSLD 327131 · label 2025-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
Dr. Mercola Magnesium Advanced was observed at $34.97 on 2026-09-21, but no cost per 100 mg is computed because the filed elemental amount (2000 mg per serving) is likely the compound mass; against 1 ranked l-threonate offer with a median of $1.1572.
computed
Chart data
| Displayed chart text |
|---|
| n=1 |
| median $1.1572 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | Momentous Magnesium Threonate | $1.1572 | 2026-11-02 |
| On review | Dr. Mercola Magnesium Advanced (this label) | Not computed | 2026-09-21 |
| Median | 1 ranked l-threonate offer | $1.1572 | 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?
At the label's own serving, Dr. Mercola Magnesium Advanced lasts 30 days: 30 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 90 Capsule(s) |
| Serving size as filed | 3 Capsule(s) |
| Servings per container | 30 |
| Servings per day in the directions | 1 |
| Days per bottle | 30 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 327131 · label 2025-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "35% Daily Value" mean here, and does it recompute?
The label declares 35% Daily Value; 145 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 35%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 35% | 420 mg | 35% |
Source · NIH DSLD 327131; 21 CFR 101.9 · label 2025-03-25 · 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?
Dr. Mercola Magnesium Advanced files 4 other ingredients and a vegetarian shell, and no magnesium stearate, against 1 of 8 l-threonate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Hydroxypropyl Methylcellulose |
| 2 | Microcrystalline Cellulose |
| 3 | Ascorbyl Palmitate |
| 4 | Hydroxypropyl Cellulose |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
Source · NIH DSLD 327131 · label 2025-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about l-threonate, and about side effects?
No study in the registry measured l-threonate as of 2026-11-02.
measured| Year | Study | PubMed |
|---|
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?
Dr. Mercola has 2 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Dr. Mercola 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-1815-2012 | 2012-08-08 | The products contain undeclared soy lecithin | Terminated |
| F-1979-2014 | 2014-06-04 | This voluntary recall has been initiated because the Dr. Mercola Organic Cocoa Cassava bars may contain undeclared milk protein. | 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 327131 · label 2025-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
3 labels use the same resolved l-threonate within ±10% of this label's 48 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| The Vitamin Shoppe Magnesium Threonate | 48 mg | No price | Needs size 00 |
| Momentous Magnesium Threonate | 48 mg | $49.99 · 2026-11-02 | Needs size 00 |
| Source Naturals Magtein Magnesium L-Threonate 667 mg | 49 mg | No price | Needs size 00 |
Source · NIH DSLD 327131 · label 2025-03-25; 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 327131 (label 2025-03-25, snapshot 2026-08-10), a price observed 2026-09-21 and the chemistry model of 2026-09-13. No data gap remains for the computed fields. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 327131 |
| Scanned label (PDF) | Label 327131 scan |
| Label date | 2025-03-25 |
| Date entered into DSLD | 2025-03-25 |
| Barcode (UPC) as filed | 8 13006 01778 7 |
| Label version · Image difference, same product | NIH DSLD 287306 |
| Label version · Image difference, same product | NIH DSLD 231840 |
| Label version · Package size difference, same product | NIH DSLD 327132 |
21 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 287305 |
| Label version · Package size difference, same product | NIH DSLD 35138 |
| Label version · Package size difference, same product | NIH DSLD 231840 |
| Label version · Package size difference, same product | NIH DSLD 287306 |
| Label version · Package size difference, same product | NIH DSLD 231834 |
| Distributed by | NHP, Cape Coral, FL, USA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Suggested Use: Adults, as a dietary supplement, take three (3) capsules daily. One (1) mid-day and two (2) at night, two (2) hours before bed. |
| Precautions re: Children | Keep out of reach of children. |
| Precautions re: All Other | Do not use if safety seal is broken. |
| Precautions re: Pregnant or Nursing or Prescription Medications | If you are nursing, pregnant, taking medication or have a medical condition, consult your physician before taking this product. |
| FDA Disclaimer Statement | These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. |
| Formulation re: Other | Bone & joint comfort Detoxification support Enhanced bioavailability |
| Formula re: Contains | Magnesium L-threonate Magtein |
| FDA Statement of Identity | Dietary Supplement |
| General Statements: All Other Content | Providing quality products since 2001. |
| Brand IP Statement(s) re: (c), (TM), (SM) | Magtein is protected under a family of US patents, pending patents, and is protected worldwide. Magtein is a trademark of Magceutics, Inc. and is distributed exclusively by AIDP, Inc. |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 327131 · label 2025-03-25; 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.