Label arithmetic · NIH DSLD 320259
LES Labs Magnesium Citrate: 225 mg of magnesium per capsule, 1–2 capsules a day, from $5.25 a month
225 mg of magnesium per capsule; the label's 1–2 capsules a day cost from $5.25 a month (Amazon, Nov 2). Inside: label lines, ingredients.
LES Labs Magnesium Citrate was observed at $20.99 on 2026-11-02 for 120 servings of 225 mg elemental magnesium as citrate: $0.0777 per 100 mg, rank 3 of 12 ranked citrate offers (1 = lowest price per 100 mg), percentile 25 (lower = lower price) (ranked prices observed 2026-10-26 to 2026-11-02). NIH DSLD 320259, label dated 2024-11-22.
computed from the filed labelData release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-11-02 · chemistry 2026-10-17
Mass: not computable · Price: $0.0777 per 100 mg · % DV: 54% vs 54%
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 225 mg of magnesium actually fit in one capsule, or do I need more than one?
The compound mass behind this label cannot be computed as of 2026-11-02: Single-salt capacity audit excluded as of 2026-10-17: buffered, complex, blend or asporotate wording leaves the composition unresolved.. The filed amounts are listed in the next block. Lower bound, not a measurement: even if all 225 mg of magnesium per serving came from magnesium oxide (60.3% magnesium), the richest magnesium salt used in supplements, because the complex or buffer does not specify every carrier, the single capsule would need at least 373 mg of compound, so at this bound it needs at least a size 0 capsule (about 545 mg at 0.8 g/mL); the actual form, which the label does not name, may need more.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 225 mg |
| Units per serving | 1 |
| Magnesium salt per serving | Not computable as of 2026-11-02 |
| Magnesium salt per capsule | Not computable as of 2026-11-02 |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Not computable as of 2026-11-02 |
Source · NIH DSLD 320259 · label 2024-11-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does the label's own text add up on magnesium?
225/750 implies 30% magnesium, incompatible with pure trimagnesium dicitrate; the complex's composition is unresolved, against a pure-salt reference of 16.16%, calculated 2026-10-17 from NIH DSLD 320259.
computed| Measure | Value |
|---|---|
| Label text (NIH DSLD statements) | 750mg of magnesium citrate complex, providing approximately 225mg of elemental magnesium |
| Implied magnesium share | 30.0% |
| Most magnesium citrate can carry | 16.2% |
Source · NIH DSLD 320259 label text · snapshot 2026-08-10; salt fractions from the chemistry model · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
LES Labs Magnesium Citrate files 1 magnesium line in NIH DSLD 320259; the selected primary line declares 225 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 |
|---|---|---|
| 225 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
Source · NIH DSLD 320259 · label 2024-11-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's magnesium claim hold up, or could the magnesium come from another source?
No single magnesium salt is resolved from the filed record as of 2026-11-02, so the source of the declared magnesium cannot be checked against capsule capacity, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| No form named as of 2026-11-02 | No defined fraction | named on label |
Source · NIH DSLD 320259 · label 2024-11-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
LES Labs Magnesium Citrate costs $0.0777 per 100 mg of elemental magnesium at the price observed 2026-11-02, rank 3 of 12 ranked citrate offers (1 = lowest price per 100 mg), percentile 25 (lower = lower price), against a same-salt median of none; prices observed 2026-10-26 to 2026-11-02. First observed 2026-10-19 at $20.99, latest 2026-11-02 at $20.99, 3 observations.
computed| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 0 | LES Labs Magnesium Citrate (this label) | $0.0777 | 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, LES Labs Magnesium Citrate lasts 60–120 days: 120 servings against 1–2 servings a day in the filed directions. from $5.25 a month at the label's suggested use (1–2 capsules a day) and $9.79 at the 420 mg Daily Value reference (21 CFR 101.9); arithmetic on the label, not intake advice.
computed| Measure | Value |
|---|---|
| Net contents as filed | 120 Capsule(s) |
| Serving size as filed | 1 Capsule(s) |
| Servings per container | 120 |
| Servings per day in the directions | 1–2 |
| Days per bottle | 60–120 days |
| Cost a month at the label suggested use | from $5.25 a month at the label's suggested use (1–2 capsules a day) |
| $ per 30 days at 420 mg Daily Value | $9.79 |
Source · NIH DSLD 320259 · label 2024-11-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "54% Daily Value" mean here, and does it recompute?
The label declares 54% Daily Value; 225 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 54%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 54% | 420 mg | 54% |
Source · NIH DSLD 320259; 21 CFR 101.9 · label 2024-11-22 · 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?
LES Labs Magnesium Citrate files 1 other ingredient and a vegetarian shell.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Hypromellose |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
Source · NIH DSLD 320259 · label 2024-11-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about this form, and about side effects?
No study in the registry measured an unresolved salt 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?
LES Labs has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. LES Labs 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 320259 · label 2024-11-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
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 320259 · label 2024-11-22; 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 320259 (label 2024-11-22, snapshot 2026-08-10), a price observed 2026-11-02 and the chemistry model of 2026-09-13. 2 gaps remain: Single-salt capacity audit excluded as of 2026-10-17: buffered, complex, blend or asporotate wording leaves the composition unresolved.; A single salt with a defined elemental fraction is unresolved as of 2026-11-02. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 320259 |
| Scanned label (PDF) | Label 320259 scan |
| Label date | 2024-11-22 |
| Date entered into DSLD | 2024-11-22 |
| Barcode (UPC) as filed | 6 02573 11481 0 |
| Label version · Image difference, same product | NIH DSLD 276523 |
| Manufactured for | LES Labs, Inc., Los Angeles, California |
| Claim category as filed | Nutrient |
15 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Suggested use: Take one (1) capsule once or twice daily or as recommended by a physician. |
| Precautions re: Children | Caution: Keep out of reach of children. |
| Precautions re: All Other | Those undergoing treatment for a medical condition should consult a physician before taking this supplement. Do not use if outer seal is missing or damaged. |
| Storage | Store in a dry, cool place. |
| Formulation re: Does NOT Contain | Made with Non-GMO ingredients |
| Seals/Symbols | Bottled & lab tested in the USA cGMP Certified Manufacturing |
| 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. |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Other | Supports energy production Helps reduce stress levels Support nerve and muscle function |
| Formulation re: Other | Magnesium citrate is a highly bioavailable source of elemental magnesium and is a cofactor in more than 300 enzyme systems in the body. Magnesium assists in energy production, support nerve and muscle function and helps reduce stress levels. |
| Formula re: Contains | Capsules contain 750mg of magnesium citrate complex, providing approximately 225mg of elemental magnesium. |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 320259 · label 2024-11-22; 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.