Label arithmetic · NIH DSLD 321465
Momentous Magnesium Threonate: 48 mg of magnesium per capsule, 3 capsules a day, $49.99 a month
48 mg of magnesium per capsule; the label's 3 capsules a day cost $49.99 a month (Amazon, Nov 2). Inside: salt weight, capsule size, price rank.
Momentous Magnesium Threonate declares 144 mg of elemental magnesium per serving as l-threonate, which needs 582 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. Observed at $1.1572 per 100 mg, the only ranked l-threonate offer, so it has no median or percentile. NIH DSLD 321465, label dated 2025-02-23.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| 545 mg |
| 730 mg |
| 1,100 mg |
| 582 mg of l-threonate per capsule |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-11-02 · chemistry 2026-10-17
Mass: 582 mg per capsule · Price: $1.1572 per 100 mg · % DV: 34% vs 34%
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 144 mg of l-threonate actually fit in one capsule, or do I need more than one?
Estimated salt mass versus assumed capsule capacity: Momentous Magnesium Threonate implies 582 mg of magnesium l-threonate in each capsule to deliver 144 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 | 144 mg |
| Units per serving | 3 |
| Magnesium l-threonate per serving | 1,745 mg |
| Magnesium l-threonate per capsule | 582 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Needs size 00 |
Source · NIH DSLD 321465 · label 2025-02-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Momentous Magnesium Threonate files 1 magnesium line in NIH DSLD 321465; the selected primary line declares 144 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 |
|---|---|---|
| 144 mg | Salt not named in this row; magnesium l-threonate is taken from the label text | Primary serving |
Source · NIH DSLD 321465 · label 2025-02-23; 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 full NIH DSLD record text; 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% | full NIH DSLD record text |
Source · NIH DSLD 321465 · label 2025-02-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
Momentous Magnesium Threonate costs $1.1572 per 100 mg of elemental magnesium at the price observed 2026-11-02, the only ranked l-threonate offer, so it has no median or percentile, against a same-salt median of $1.1572; prices observed 2026-10-26 to 2026-11-02. First observed 2026-10-26 at $49.99, latest 2026-11-02 at $49.99, 2 observations.
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 |
| 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, Momentous Magnesium Threonate lasts 30 days: 30 servings against 1 serving a day in the filed directions. $49.99 a month at the label's suggested use (3 capsules a day) and $145.81 at the 420 mg Daily Value reference (21 CFR 101.9); arithmetic on the label, not intake advice.
computed| Measure | Value |
|---|---|
| Net contents as filed | 90 Vegetarian 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 |
| Cost a month at the label suggested use | $49.99 a month at the label's suggested use (3 capsules a day) |
| $ per 30 days at 420 mg Daily Value | $145.81 |
Source · NIH DSLD 321465 · label 2025-02-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "34% Daily Value" mean here, and does it recompute?
The label declares 34% Daily Value; 144 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 34%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 34% | 420 mg | 34% |
Source · NIH DSLD 321465; 21 CFR 101.9 · label 2025-02-23 · 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?
Momentous Magnesium Threonate files 3 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 | Cellulose |
| 2 | Microcrystalline Cellulose |
| 3 | Stearate |
| Shell | vegetarian |
| Target group | Vegan |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
1 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Dairy Free |
Source · NIH DSLD 321465 · label 2025-02-23; 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?
Momentous has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Momentous 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 |
|---|---|---|---|
| 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 321465 · label 2025-02-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
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 |
| Dr. Mercola Magnesium Advanced | 48 mg | $34.97 · 2026-09-21 | Needs size 00 |
| Source Naturals Magtein Magnesium L-Threonate 667 mg | 49 mg | No price | Needs size 00 |
Source · NIH DSLD 321465 · label 2025-02-23; 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 321465 (label 2025-02-23, snapshot 2026-08-10), a price observed 2026-11-02 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 321465 |
| Scanned label (PDF) | Label 321465 scan |
| Label date | 2025-02-23 |
| Date entered into DSLD | 2025-02-23 |
| Barcode (UPC) as filed | 8 50030 79604 2 |
| Formulated and Distributed by | Momentous, Park City, UT |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
15 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | Structure/Function |
| General Statements: All Other Content | The continuous pursuit of progress in human health and performance. |
| Formula re: Contains | Momentous Magnesium Threonate supports brain health and normal cognitive function, containing 2 grams of Magtein per serving. Magnesium Threonate is a highly bioavailable magnesium demonstrated to cross the blood-brain barrier and support brain health |
| Suggested/Recommended/Usage/Directions | Directions: Take 3 capsules per day, or as directed by your health care practitioner. |
| Storage | Store at room temperature. |
| Precautions re: Children | Keep out of reach of children. |
| Brand IP Statement(s) re: (c), (TM), (SM) | Magtein is a registered trademark of Magceutics, Inc. and is patented under U.S. patents 8,178,118; 8,142,803; 8,163,301; and other pending patents. Magtein is distributed exclusively by AIDP, Inc. |
| Formulation re: Other | Sleep and cognitive support |
| Formulation re: Does NOT Contain | Gluten free GMO free Dairy free |
| Formulation re: Vegetarian/Vegan | Vegan |
| Seals/Symbols | Vegan NSF Certified Sport |
| FDA Statement of Identity | Dietary Supplement |
| 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. |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 321465 · label 2025-02-23; 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.