Label arithmetic · NIH DSLD 232184
Douglas Laboratories Magnesium Taurate 400: 100 mg of magnesium per tablet, 4 tablets a day
100 mg of magnesium per tablet; the label's 4 tablets a day give 400 mg. No US price matched (Nov 2). Inside: salt weight, %DV check.
Douglas Laboratories Magnesium Taurate 400 declares 400 mg of elemental magnesium per serving as taurate, which means 4,484 mg of magnesium taurate pressed into 4 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; 2 of the 4 taurate labels in this registry have a matched price. NIH DSLD 232184, label dated 2020-08-23.
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: 1,121 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 taurate is pressed into one tablet?
Douglas Laboratories Magnesium Taurate 400 carries 4,484 mg of magnesium taurate 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 | 4 |
| Magnesium taurate per serving | 4,484 mg |
| Magnesium taurate per tablet | 1,121 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Capsule sizes do not apply |
Source · NIH DSLD 232184 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Douglas Laboratories Magnesium Taurate 400 files 1 magnesium line in NIH DSLD 232184; 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 | taurate · Magnesium (Form: as Magnesium Taurate) | Primary serving |
Source · NIH DSLD 232184 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's taurate claim hold up, or could the magnesium come from another source?
The label names one magnesium form, taurate, 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 taurate | 8.9% | filed magnesium line |
Source · NIH DSLD 232184 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
No US retail price is matched to this label as of 2026-11-02; 2 of 4 taurate labels have one, against a median of $0.1842 per 100 mg among 4 ranked taurate offers.
computed
Chart data
| Displayed chart text |
|---|
| n=4, band unstable |
| P25 $0.1355 |
| P75 $0.2332 |
| median $0.1842 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | KAL Magnesium Taurate + | $0.1033 | 2026-11-02 |
| 2 | Cardiovascular Research Magnesium Taurate | $0.1462 | 2026-10-26 |
| 3 | Codeage Liposomal Magnesium Taurate+ | $0.2222 | 2026-11-02 |
| 4 | Natural Rhythm Magnesium Taurate | $0.2661 | 2026-11-02 |
| Median | 4 ranked taurate offers | $0.1842 | 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, Douglas Laboratories Magnesium Taurate 400 lasts 30 days: 30 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 120 Tablet(s) |
| Serving size as filed | 4 Tablet(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 232184 · label 2020-08-23; 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 232184; 21 CFR 101.9 · label 2020-08-23 · 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?
Douglas Laboratories Magnesium Taurate 400 files 7 other ingredients and a vegetarian shell, and no magnesium stearate, against 1 of 4 taurate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Microcrystalline Cellulose |
| 2 | Dicalcium Phosphate |
| 3 | Coating |
| 4 | Stearic Acid |
| 5 | Vegetable Stearate |
| 6 | Croscarmellose Sodium |
| 7 | Silica |
| Shell | vegetarian |
2 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
Source · NIH DSLD 232184 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about taurate, and about side effects?
1 study in the PubMed-checked registry measured outcomes involving taurate; none reports a gastrointestinal outcome as of 2026-11-02. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2019 | Timeline (Bioavailability) of Magnesium Compounds in Hours: Which Magnesium Compound Works Best? | 29679349 |
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?
Douglas Laboratories has 1 FDA recall record matched by brand name in the enforcement data queried 2026-10-19. Douglas Laboratories 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-1202-2015 | 2015-02-18 | Bottles contained a vegetarian digestive enzyme dietary supplement instead of melatonin. | 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 232184 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
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 232184 · label 2020-08-23; 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 232184 (label 2020-08-23, 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 3 10539 01274 1). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 232184 |
| Label date | 2020-08-23 |
| Date entered into DSLD | 2020-08-23 |
| Barcode (UPC) as filed | 3 10539 01274 1 |
| Label version · Image difference, same product | NIH DSLD 5290 |
| Label version · Image difference, same product | NIH DSLD 10158 |
| Label version · Image difference, same product | NIH DSLD 176576 |
| Label version · Package size difference, same product | NIH DSLD 10157 |
19 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 5290 |
| Label version · Package size difference, same product | NIH DSLD 10158 |
| Label version · Package size difference, same product | NIH DSLD 176576 |
| Label version · Image difference, same product | NIH DSLD 261957 |
| Label version · Package size difference, same product | NIH DSLD 261957 |
| Manufactured by | Douglas Laboratories, Pittsburgh, PA |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Suggested Usage: As a dietary supplement, adults take 4 tablets daily or as directed by your healthcare professional. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Warning: If you are pregnant, nursing, have any health condition or taking any medication, consult your health care practitioner before using this product. |
| Precautions re: Children | Keep out of the reach of children. |
| Storage | Store in a cool, dry place. |
| Precautions re: All Other | Use only if safety seal is intact. |
| Formulation re: Does NOT Contain | Gluten-free, Non-GMO |
| FDA Disclaimer Statement | This statement has 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 | Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity. Scan to learn about our manufacturing excellence |
| FDA Statement of Identity | Dietary Supplement |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 232184 · label 2020-08-23; 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.