Label arithmetic · NIH DSLD 326454
Protocol For Life Balance Magtein Magnesium L-Threonate: 144 mg of magnesium per capsule, 3 capsules a day
144 mg of magnesium per capsule; the label's 3 capsules a day give 432 mg. No US price matched (Nov 2). Inside: salt weight, capsule size.
Protocol For Life Balance Magtein Magnesium L-Threonate declares 144 mg of elemental magnesium per serving as l-threonate, which needs 1,745 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. No US retail price matched as of 2026-11-02; 2 of the 8 l-threonate labels in this registry have a matched price. NIH DSLD 326454, label dated 2025-03-25.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| 545 mg |
| 730 mg |
| 1,100 mg |
| 1,745 mg of l-threonate per capsule |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 1,745 mg per capsule · Price: none matched · % 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: Protocol For Life Balance Magtein Magnesium L-Threonate implies 1,745 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. The label's 90 capsules over 30 servings imply 3 per serving, so that number is used.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 144 mg |
| Units per serving | 1 |
| Magnesium l-threonate per serving | 1,745 mg |
| Magnesium l-threonate per capsule | 1,745 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Needs size 00 |
Source · NIH DSLD 326454 · label 2025-03-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Protocol For Life Balance Magtein Magnesium L-Threonate files 1 magnesium line in NIH DSLD 326454; 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 | threonate · elemental, from 2,000 Magtein Magnesium L-Threonate | Primary serving |
Source · NIH DSLD 326454 · 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 326454 · 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?
No US retail price is matched to this label as of 2026-11-02; 2 of 8 l-threonate labels have one, against a median of $1.1572 per 100 mg among 1 ranked l-threonate offer.
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, Protocol For Life Balance Magtein Magnesium L-Threonate lasts 10 days: 30 servings against 3 servings a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 90 Veg Capsule(s) |
| Serving size as filed | 1 Veg Capsule(s) |
| Servings per container | 30 |
| Servings per day in the directions | 3 |
| Days per bottle | 10 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 326454 · label 2025-03-25; 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 326454; 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?
Protocol For Life Balance Magtein Magnesium L-Threonate 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 | Hypromellose |
| 2 | Rice Flour |
| 3 | Stearic Acid |
| 4 | Silicon Dioxide |
| Shell | vegetarian |
| Target group | Vegan |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
2 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Gluten Free |
| Target group | Dairy Free |
Source · NIH DSLD 326454 · 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?
Protocol For Life Balance has 1 FDA recall record matched by brand name in the enforcement data queried 2026-10-19. Protocol For Life Balance 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-0859-2024 | 2024-02-14 | Amount of Phosphatidyl Serine in product is less than stated on the label | 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 326454 · 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?
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 326454 · 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 326454 (label 2025-03-25, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 1 gap remain: No US retail price matched as of 2026-11-02 (barcode 7 07359 12390 8). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 326454 |
| Scanned label (PDF) | Label 326454 scan |
| Label date | 2025-03-25 |
| Date entered into DSLD | 2025-03-25 |
| Barcode (UPC) as filed | 7 07359 12390 8 |
| Formulated & Distributed by | Protocol For Life Balance, Bloomingdale, IL, USA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
17 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Suggested Usage: Take 3 capsules daily in divided doses (take 1 capsule in the morning and take 2 capsules two hours before sleep), or as directed by your healthcare practitioner. |
| Formula re: Contains | How it works: Magnesium (Mg) is known to play a major role in cellular metabolism and is critical for normal nervous system function. Recent research has demonstrated that Mg also helps to regulate neuronal synapse density and that availability of Mg in the brain is necessary for the stability and adaptability of these neuronal connections. Magtein (Magnesium L-Threonate) is a patented form of Mg that crosses the blood-brain barrier and is readily utilized in the brain. Preclinical studies indicate that Magtein may support healthy cognitive function, learning, and memory, and may promote a relaxed mood. |
| Precautions re: All Other | Cautions/Interactions: May cause drowsiness. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Magnesium may interact with some antibiotics, diuretics, bisphosphonates, and muscle relaxants. In addition, many medications can affect magnesium absorption and excretion. If you are taking any medications, or if you are pregnant/nursing, consult your healthcare practitioner before using 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 | Delivers Magnesium to the nervous system Promotes healthy cognitive function |
| Formulation re: Does NOT Contain | Non-GMO |
| FDA Statement of Identity | A Dietary Supplement |
| Formulation re: Vegetarian/Vegan | Vegetarian/Vegan |
| Formulation re: Does NOT Contain | Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. |
| Precautions re: Allergies | Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish, tree nut or sesame ingredients. Produced in a GMP facility that processes other ingredients containing these allergens. |
| Brand IP Statement(s) re: (c), (TM), (SM) | Magtein in 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. |
| Formulation re: Other | Natural color variation may occur in this product. |
| Storage | Store in a cool, dry place after opening. |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 326454 · 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.