Label arithmetic · NIH DSLD 257602
Bronson Laboratories Magnesium Citrate with Vitamin B6: 100 mg of magnesium per tablet, 1–2 tablets a day
100 mg of magnesium per tablet; the label's 1–2 tablets a day give 100–200 mg. No US price matched (Nov 2). Inside: salt weight, %DV check.
Bronson Laboratories Magnesium Citrate with Vitamin B6 declares 100 mg of elemental magnesium per serving as citrate, which means 619–885 mg of magnesium citrate pressed into 1 tablet, 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 257602, label dated 2021-10-22.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 1,706 |
| orotate |
| 1,376 |
| L-threonate |
| 1,212 |
| taurate |
| 1,121 |
| lactate |
| 833 |
| glycerophosphate |
| 800 |
| glycinate |
| 709 |
| malate |
| 644 |
| aspartate |
| 639 |
| citrate |
| 619 |
| sulfate |
| 495 |
| chloride |
| 392 |
| carbonate |
| 347 |
| hydroxide |
| 240 |
| oxide |
| 166 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 619–885 mg per tablet · Price: none matched · % DV: 24% vs 24%
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?
Bronson Laboratories Magnesium Citrate with Vitamin B6 carries 619–885 mg of magnesium citrate per serving for 100 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 | 100 mg |
| Units per serving | 1 |
| Magnesium citrate per serving | 619–885 mg |
| Magnesium citrate per tablet | 619–885 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 257602 · label 2021-10-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Bronson Laboratories Magnesium Citrate with Vitamin B6 files 1 magnesium line in NIH DSLD 257602; the selected primary line declares 100 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 |
|---|---|---|
| 100 mg | citrate · Magnesium (Form: as Magnesium Citrate) | Primary serving |
Source · NIH DSLD 257602 · label 2021-10-22; 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 257602 · label 2021-10-22; 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, Bronson Laboratories Magnesium Citrate with Vitamin B6 lasts 125–250 days: 250 servings against 1–2 servings a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 250 Tablet(s) |
| Serving size as filed | 1 Tablet(s) |
| Servings per container | 250 |
| Servings per day in the directions | 1–2 |
| Days per bottle | 125–250 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 257602 · label 2021-10-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "24% Daily Value" mean here, and does it recompute?
The label declares 24% Daily Value; 100 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 24%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 24% | 420 mg | 24% |
Source · NIH DSLD 257602; 21 CFR 101.9 · label 2021-10-22 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
Bronson Laboratories Magnesium Citrate with Vitamin B6 files 7 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 | Microcrystalline Cellulose |
| 2 | Dicalcium Phosphate |
| 3 | Croscarmellose Sodium |
| 4 | Magnesium Stearate |
| 5 | Hydroxypropyl Methylcellulose |
| 6 | Polyethylene Glycol |
| 7 | Titanium Dioxide |
| Shell | vegetarian |
1 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Adult (18 - 50 Years) |
Source · NIH DSLD 257602 · label 2021-10-22; 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?
Bronson Laboratories has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Bronson Laboratories has no FDA CAERS adverse event report on record at brand level as of 2026-10-19 (143 of 273 brands in this registry have at least one CAERS report).
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 257602 · label 2021-10-22; 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 100 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| XYMOGEN Magnesium Citrate (DSLD 6139) | 100 mg | $36.99 · 2026-11-02 | Needs size 00 |
| Vitamin World Magnesium Citrate | 100 mg | No price | Needs size 00 |
| XYMOGEN Magnesium Citrate (DSLD 50041) | 100 mg | $36.99 · 2026-11-02 | Needs size 00 |
| Spring Valley Rapid-Release Magnesium Citrate 100 mg | 100 mg | No price | Needs size 00 |
| H-E-B Magnesium Citrate 100 mg | 100 mg | No price | Needs size 00 |
| Genestra Brands Magnesium | 100 mg | No price | Needs size 00 |
Source · NIH DSLD 257602 · label 2021-10-22; 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 257602 (label 2021-10-22, 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 16563 15802 6). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 257602 |
| Label date | 2021-10-22 |
| Date entered into DSLD | 2021-10-22 |
| Barcode (UPC) as filed | 7 16563 15802 6 |
| Label version · Image difference, same product | NIH DSLD 8595 |
| Label version · Image difference, same product | NIH DSLD 25086 |
| Label version · Package size difference, same product | NIH DSLD 8595 |
| Label version · Package size difference, same product | NIH DSLD 25086 |
22 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 8594 |
| Label version · Package size difference, same product | NIH DSLD 257600 |
| Manufactured by | Bronson Laboratories, Hauppauge, NY, USA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Brand IP Statement(s) re: (c), (TM), (SM) | Bronson Since 1960 Nutrition+ |
| Formulation re: Other | Supports bone and muscle health Promotes heart and nerve health |
| FDA Statement of Identity | Dietary Supplement |
| Formula re: Contains | 250 count 100 mg magnesium 5 mg vitamin B6 Mineral formulas |
| Suggested/Recommended/Usage/Directions | Directions: As a dietary supplement for adults, take 1 tablet one to two times daily, preferably with a meal or as directed by a healthcare professional. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Warning: If you are pregnant, nursing or taking any medications, consult your healthcare professional before use. |
| Precautions re: All Other | Do not use if seal under cap is broken or missing. |
| Storage | Store at room temperature. |
| Precautions re: Children | Keep out of reach of children. |
| 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. |
| General Statements: All Other Content | 365 days 100% money back guaranteed |
| Seals/Symbols | GMP good manufacturing practice |
| General Statements: All Other Content | Nutrition questions or comments? Mon. - Fri. 7 AM - 6 PM MST Sat. 8 AM - 4:30 PM MST |
| Formulation re: Other | Lab tested Made from high quality ingredients |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 257602 · label 2021-10-22; 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.