Label arithmetic · NIH DSLD 73011
Protocol For Life Balance Magnesium Citrate: 200 mg of magnesium per tablet, 2 tablets a day
200 mg of magnesium per tablet; the label's 2 tablets a day give 400 mg. No US price matched (Nov 2). Inside: salt weight, %DV check.
Protocol For Life Balance Magnesium Citrate declares 400 mg of elemental magnesium per serving as citrate, which means 2,475–3,540 mg of magnesium citrate pressed into 2 tablets, compared with 1,100 mg in the largest standard capsule; capsule verdicts do not apply to a tablet. No US retail price matched as of 2026-11-02; 17 of the 135 citrate labels in this registry have a matched price. NIH DSLD 73011, label dated 2017-04-25.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 6,826 |
| orotate |
| 5,502 |
| L-threonate |
| 4,848 |
| taurate |
| 4,484 |
| lactate |
| 3,331 |
| glycerophosphate |
| 3,200 |
| glycinate |
| 2,837 |
| malate |
| 2,574 |
| aspartate |
| 2,558 |
| citrate |
| 2,475 |
| sulfate |
| 1,981 |
| chloride |
| 1,567 |
| carbonate |
| 1,387 |
| hydroxide |
| 960 |
| oxide |
| 663 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 1,238–1,770 mg per tablet · Price: none matched · % DV: 95% vs 95%
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 citrate is pressed into one tablet?
Protocol For Life Balance Magnesium Citrate carries 2,475–3,540 mg of magnesium citrate per serving for 400 mg of elemental magnesium, against 1,100 mg in the largest standard capsule; capsule capacities do not apply to this tablet or pill.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 400 mg |
| Units per serving | 2 |
| Magnesium citrate per serving | 2,475–3,540 mg |
| Magnesium citrate per tablet | 1,238–1,770 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Capsule sizes do not apply |
The filed salt can have more than one hydration state (trimagnesium dicitrate 16.2%; dibasic and hydrated forms as low as 11.3%), so the compound mass is a range.
Source · NIH DSLD 73011 · label 2017-04-25; 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 Magnesium Citrate files 1 magnesium line in NIH DSLD 73011; the selected primary line declares 400 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 |
|---|---|---|
| 400 mg | citrate · Magnesium (Form: from Magnesium Citrate) | Primary serving |
Source · NIH DSLD 73011 · label 2017-04-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's citrate claim hold up, or could the magnesium come from another source?
The label names one magnesium form, citrate, resolved from the filed magnesium line; 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 citrate | 11.3–16.2% | filed magnesium line |
Source · NIH DSLD 73011 · label 2017-04-25; 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; 17 of 135 citrate labels have one, against a median of $0.1159 per 100 mg among 12 ranked citrate offers.
computed
Chart data
| Displayed chart text |
|---|
| n=12 |
| P25 $0.0843 |
| P75 $0.1469 |
| median $0.1159 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | Best Naturals Magnesium Citrate 200 mg | $0.0344 | 2026-11-02 |
| 2 | Solgar Magnesium Citrate | $0.0607 | 2026-11-02 |
| 3 | LES Labs Magnesium Citrate | $0.0777 | 2026-11-02 |
| 4 | Bluebonnet Magnesium Citrate | $0.0865 | 2026-11-02 |
| 5 | Solaray Magnesium Citrate 400 mg | $0.0868 | 2026-11-02 |
| Median | 12 ranked citrate offers | $0.1159 | 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 Magnesium Citrate lasts 50 days: 50 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 100 Tablet(s) |
| Serving size as filed | 2 Tablet(s) |
| Servings per container | 50 |
| Servings per day in the directions | 1 |
| Days per bottle | 50 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 73011 · label 2017-04-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "95% Daily Value" mean here, and does it recompute?
The label declares 95% Daily Value; 400 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 95%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 95% | 420 mg | 95% |
Source · NIH DSLD 73011; 21 CFR 101.9 · label 2017-04-25 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
Protocol For Life Balance Magnesium Citrate files 5 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 43 of 135 citrate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Cellulose |
| 2 | Stearic Acid |
| 3 | Croscarmellose Sodium |
| 4 | Magnesium Stearate |
| 5 | Vegetarian Coating |
| Shell | vegetarian |
| Target group | Vegan |
| Target group | Vegetarian |
4 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Adult (18 - 50 Years) |
| Target group | Kosher |
| Target group | Gluten Free |
| Target group | Dairy Free |
Source · NIH DSLD 73011 · label 2017-04-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about citrate, and about side effects?
10 studies in the PubMed-checked registry measured outcomes involving citrate; 1 mention gastrointestinal or adverse outcomes. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2025 | Comparing the Bioavailability of Two Seawater-Derived Magnesium Preparations. | 40955524 |
| 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?
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 73011 · label 2017-04-25; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
6 labels use the same resolved citrate within ±10% of this label's 200 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| Vitabase Magnesium Citrate 200 mg | 200 mg | No price | Capsule sizes do not apply |
| The Vitamin Shoppe Magnesium Citrate 200 mg (DSLD 55722) | 200 mg | No price | Capsule sizes do not apply |
| Vitamin World Magnesium Citrate 200 mg | 200 mg | No price | Capsule sizes do not apply |
| The Vitamin Shoppe Magnesium Citrate 200 mg (DSLD 204430) | 200 mg | No price | Capsule sizes do not apply |
| The Vitamin Shoppe Magnesium Citrate 200 mg (DSLD 204431) | 200 mg | No price | Capsule sizes do not apply |
| AN Amazing Nutrition Amazing Formulas Magnesium Citrate 200 mg | 200 mg | No price | Capsule sizes do not apply |
Source · NIH DSLD 73011 · label 2017-04-25; 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 73011 (label 2017-04-25, 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 11290 2). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 73011 |
| Label date | 2017-04-25 |
| Date entered into DSLD | 2017-04-25 |
| Barcode (UPC) as filed | 7 07359 11290 2 |
| Label version · Package size difference, same product | NIH DSLD 69323 |
| Label version · Image difference, same product | NIH DSLD 69323 |
| Label version · Package size difference, same product | NIH DSLD 15096 |
| Label version · Package size difference, same product | NIH DSLD 15097 |
25 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 73053 |
| Label version · Image difference, same product | NIH DSLD 15096 |
| Manufacturer | Protocol For Life Balance, Bloomingdale, IL, USA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Suggested Usage: Take 2 tablets daily with food, or as directed by your healthcare practitioner. |
| General Statements: All Other Content | How It Works: Magnesium is a mineral that is essential for a wide range of fundamental cellular functions as it is a cofactor in at least 300 different enzymatic reactions.* Magnesium is well known for its roles in healthy cardiovascular function and bone formation and mineralization.* It is also critical for the regulation of muscle contraction and nerve conductivity through its influence on cell membrane permeability, as well as on the maintenance of the proper charge balance of the bodily fluids.* In addition, Magnesium is essential for the production of cellular energy from the metabolism of carbohydrate and fat.* |
| Precautions re: All Other | Cautions/Interactions: Large doses of oral magnesium may have a laxative effect. |
| 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 prescription medications, consult your healthcare practitioner before using this product. |
| General: Product/Version Code | CODE P1290 V3 |
| General Statements: All Other Content | ~ Cardiovascular support* |
| Formula re: Contains | ~ Bioavailable form of magnesium |
| Seals/Symbols | Non-GMO |
| Formulation re: Does NOT Contain | Non-GMO |
| FDA Statement of Identity | A Dietary Supplement |
| Formulation re: Vegetarian/Vegan | Vegetarian/Vegan |
| Seals/Symbols | Triangle K |
| Formula re: Kosher | Triangle K |
| Formulation re: Does NOT Contain | Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. |
| Precautions re: Allergies | Not manufactured with wheat, gluten, soy, milk, egg, fish, shellfish or tree nut ingredients. Produced in a GMP facility that processes other ingredients containing these allergens. |
| General Statements: All Other Content | Natural color variation may occur in 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. |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 73011 · label 2017-04-25; 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.