Label arithmetic · NIH DSLD 332572
Bluebonnet Magnesium Citrate: 400 mg of magnesium per 2 caplet, 30 servings
400 mg of magnesium in each 2 caplet, about 30 servings per 60 Caplet. Citrate is 11.3–16.2% magnesium. Inside: label lines, ingredients.
Bluebonnet Magnesium Citrate declares 400 mg of elemental magnesium per serving as citrate, which means 2,475–3,540 mg of magnesium citrate compound in one 2 caplet(s), compared with 1,100 mg in the largest standard capsule; capsule verdicts do not apply to this other (e.g. tea bag). 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 332572, label dated 2025-07-24.
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 serving · 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 compound is in one serving?
Bluebonnet 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 other (e.g. tea bag).
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 serving | 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 332572 · label 2025-07-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Bluebonnet Magnesium Citrate files 1 magnesium line in NIH DSLD 332572; 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 | Salt not named in this row; magnesium citrate is taken from the label text | Primary serving |
Source · NIH DSLD 332572 · label 2025-07-24; 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 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 citrate | 11.3–16.2% | full NIH DSLD record text |
Source · NIH DSLD 332572 · label 2025-07-24; 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, Bluebonnet Magnesium Citrate lasts 30 days: 30 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 60 Caplet(s) |
| Serving size as filed | 2 Caplet(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 332572 · label 2025-07-24; 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 332572; 21 CFR 101.9 · label 2025-07-24 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
Bluebonnet 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 | Magnesium Stearate |
| 4 | Silicon Dioxide |
| 5 | Glaze |
| Shell | vegetarian |
| Target group | Vegan |
| Target group | Vegetarian |
6 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Adult (18 - 50 Years) |
| Target group | Kosher |
| Target group | No Allergies |
| Target group | Gluten Free |
| Target group | Dairy Free |
| Target group | Sugar Free |
Source · NIH DSLD 332572 · label 2025-07-24; 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?
Bluebonnet has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Bluebonnet 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 332572 · label 2025-07-24; 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 |
| Protocol For Life Balance Magnesium Citrate | 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 |
Source · NIH DSLD 332572 · label 2025-07-24; 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 332572 (label 2025-07-24, 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 43715 00729 1). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 332572 |
| Scanned label (PDF) | Label 332572 scan |
| Label date | 2025-07-24 |
| Date entered into DSLD | 2025-07-24 |
| Barcode (UPC) as filed | 7 43715 00729 1 |
| Label version · Image difference, same product | NIH DSLD 109169 |
| Label version · Image difference, same product | NIH DSLD 178434 |
| Label version · Image difference, same product | NIH DSLD 204235 |
29 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 178436 |
| Label version · Package size difference, same product | NIH DSLD 203860 |
| Label version · Package size difference, same product | NIH DSLD 317204 |
| Label version · Image difference, same product | NIH DSLD 314824 |
| Label version · Image difference, same product | NIH DSLD 268309 |
| Label version · Package size difference, same product | NIH DSLD 314824 |
| Label version · Package size difference, same product | NIH DSLD 332573 |
| Manufactured by | Bluebonnet Nutrition Corporation, Sugar Land, TX, USA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Formula re: Contains | Bluebonnet's Magnesium Citrate 400mg Caplets are formulated with magnesium in a chelate of magnesium citrate. Magnesium is required in over 300 biochemical reactions in the body, and it is primarily known to calm the mind and body, reduce stress, induce restful sleep, increase bone density, as well as support immune and heart health. |
| Formulation re: Other | May support Rest & relaxation Bone health Heart health |
| Formulation re: Does NOT Contain | Free of milk, egg, fish, crustacean shellfish, tree nuts, peanuts, wheat, soybeans and sesame. Also free of gluten, barley, rice and sugar. |
| Formula re: Contains | Minerals are shown in their elemental value. |
| Formula re: Kosher | Bluebonnet's KOF-K Certification #K-0000700 |
| Precautions re: Children | Caution: For adults only. Keep out of reach of children. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Consult physician if pregnant/nursing, taking medication, or have a medical condition. |
| 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: Does NOT Contain | Made with non GMO ingredients Gluten free |
| Formulation re: Vegetarian/Vegan | Vegan |
| Formula re: Kosher | KOF-K (Kosher) Parve |
| Seals/Symbols | KOF-K (Kosher) Parve Vegan |
| Formulation re: Other | Relaxation, bone & heart health |
| FDA Statement of Identity | Dietary Supplement |
| Suggested/Recommended/Usage/Directions | Directions: As a dietary supplement, take two caplets once daily or as directed by a healthcare practitioner. |
| Storage | Store tightly closed in a cool, dry place. |
| Physical state | Other (e.g. tea bag) |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 332572 · label 2025-07-24; 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.