Label arithmetic · NIH DSLD 232560
Douglas Laboratories Magnesium Aspartate: 100 mg of magnesium per capsule, 1 capsule a day
100 mg of magnesium per capsule, 1 a day. No US price matched (Nov 2). Inside: salt weight, capsule size.
Douglas Laboratories Magnesium Aspartate declares 100 mg of elemental magnesium per serving as aspartate, which needs 639–1,335 mg of magnesium aspartate in each capsule, against 730 mg in a size 00 capsule at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range: it needs size 00 or larger. No US retail price matched as of 2026-11-02; 3 of the 25 aspartate labels in this registry have a matched price. NIH DSLD 232560, label dated 2020-08-23.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| 545 mg |
| 730 mg |
| 1,100 mg |
| 639–1,335 mg of aspartate per capsule |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 639–1,335 mg per capsule · 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.
Will 100 mg of aspartate actually fit in one capsule, or do I need more than one?
Estimated salt mass versus assumed capsule capacity: Douglas Laboratories Magnesium Aspartate implies 639–1,335 mg of magnesium aspartate in each capsule to deliver 100 mg of elemental magnesium, against 1,100 mg in the largest standard capsule (size 000) at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range. Verdict: needs size 00, read at the most favourable hydration and the most units per serving.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 100 mg |
| Units per serving | 1 |
| Magnesium aspartate per serving | 639–1,335 mg |
| Magnesium aspartate per capsule | 639–1,335 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Needs size 00 |
The filed salt can have more than one hydration state (1:1 magnesium aspartate 15.64%; bis(hydrogen aspartate) 8.42%, its dihydrate 7.49%; stoichiometry and hydration unresolved), so the compound mass is a range.
Source · NIH DSLD 232560 · 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 Aspartate files 1 magnesium line in NIH DSLD 232560; 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 | aspartate · Magnesium (Form: as Magnesium Aspartate) | Primary serving |
Source · NIH DSLD 232560 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's aspartate claim hold up, or could the magnesium come from another source?
The label names one magnesium form, aspartate, resolved from the filed magnesium line; at that salt the declaration is within the assumed size 000 capacity at powder density 0.8 g/mL, compared with oxide, the salt richest in magnesium at 60.3%.
computed with assumption| Form named on the label | Elemental fraction | Source |
|---|---|---|
| Magnesium aspartate | 7.5–15.6% | filed magnesium line |
Source · NIH DSLD 232560 · 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; 3 of 25 aspartate labels have one, against a median of none per 100 mg among 0 ranked aspartate offers.
computed| Rank | Label | Per 100 mg | Observed |
|---|
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 Aspartate lasts 100 days: 100 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 100 Capsule(s) |
| Serving size as filed | 1 Capsule(s) |
| Servings per container | 100 |
| Servings per day in the directions | 1 |
| Days per bottle | 100 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 232560 · label 2020-08-23; 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 232560; 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 Aspartate files 4 other ingredients and a gelatin shell, and no magnesium stearate, against 15 of 25 aspartate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Gelatin |
| 2 | Microcrystalline Cellulose |
| 3 | Vegetable Stearate |
| 4 | Silica |
| Shell | gelatin |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
Source · NIH DSLD 232560 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about aspartate, and about side effects?
2 studies in the PubMed-checked registry measured outcomes involving aspartate; none reports a gastrointestinal outcome as of 2026-11-02. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2005 | Study of magnesium bioavailability from ten organic and inorganic Mg salts in Mg-depleted rats using a stable isotope approach | 16548135 |
| 2001 | Bioavailability of US commercial magnesium preparations | 11794633 |
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?
Same filed formulation as 1 other labels of this brand; no other brand files it as of 2026-11-02.
computed| Label | Brand | Price per 100 mg |
|---|---|---|
| No cross-brand match as of 2026-11-02 |
Source · NIH DSLD 232560 · 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?
6 labels use the same resolved aspartate 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 |
|---|---|---|---|
| DC Magnesium & Potassium Aspartate | 100 mg | No price | Needs size 00 |
| Douglas Laboratories Magnesium Aspartate | 100 mg | No price | Needs size 00 |
| Wonder Laboratories Magnesium Potassium Aspartate (DSLD 260785) | 100 mg | No price | Needs size 00 |
| Wonder Laboratories Magnesium Potassium Aspartate (DSLD 262843) | 100 mg | No price | Needs size 00 |
| Wonder Laboratories Magnesium Potassium Aspartate (DSLD 262844) | 100 mg | No price | Needs size 00 |
| Wonder Laboratories Magnesium Potassium Aspartate (DSLD 262846) | 100 mg | No price | Needs size 00 |
Source · NIH DSLD 232560 · 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 232560 (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 07405 3). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 232560 |
| Label date | 2020-08-23 |
| Date entered into DSLD | 2020-08-23 |
| Barcode (UPC) as filed | 3 10539 07405 3 |
| Label version · Image difference, same product | NIH DSLD 5296 |
| Label version · Image difference, same product | NIH DSLD 8643 |
| Label version · Image difference, same product | NIH DSLD 56467 |
| Label version · Package size difference, same product | NIH DSLD 5296 |
20 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 8643 |
| Label version · Package size difference, same product | NIH DSLD 56467 |
| Label version · Package size difference, same product | NIH DSLD 245305 |
| Label version · Package size difference, same product | NIH DSLD 30502 |
| Label version · Package size difference, same product | NIH DSLD 56468 |
| Label version · Package size difference, same product | NIH DSLD 8645 |
| 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 1 capsule 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 professional 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 | Scan to learn about our manufacturing excellence Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity. |
| FDA Statement of Identity | Dietary Supplement |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 232560 · 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.