Label arithmetic · NIH DSLD 274897
Source Naturals Magnesium Ascorbate: 68 mg of magnesium per 1.25 gram, 181 servings
68 mg of magnesium in each 1.25 gram, about 181 servings per 8 Ounce. Salt not resolved from the NIH record. Inside: label lines, ingredients.
Source Naturals Magnesium Ascorbate declares 68 mg of elemental magnesium per 1.25 gram(s) (.25 rounded teaspoon); the magnesium salt is not resolved from the filed record, Single-salt capacity audit excluded as of 2026-10-17: one salt with a defined elemental fraction is not resolved., as of 2026-11-02. No US retail price matched as of 2026-11-02. NIH DSLD 274897, label dated 2022-11-22.
as filedData release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: not computable · Price: none matched · % DV: 16% vs 16%
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 magnesium compound powder is in one scoop?
The compound mass behind this label cannot be computed as of 2026-11-02: Single-salt capacity audit excluded as of 2026-10-17: one salt with a defined elemental fraction is not resolved.. The filed amounts are listed in the next block.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 68 mg |
| Units per serving | Not a discrete unit as of 2026-11-02 |
| Magnesium salt per serving | Not computable as of 2026-11-02 |
| Magnesium salt per serving | 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 274897 · label 2022-11-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Source Naturals Magnesium Ascorbate files 1 magnesium line in NIH DSLD 274897; the selected primary line declares 68 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 |
|---|---|---|
| 68 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
Source · NIH DSLD 274897 · label 2022-11-22; 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 274897 · label 2022-11-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
No US retail price is matched to this label as of 2026-11-02, and without a resolved salt there is no same-salt comparison.
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, Source Naturals Magnesium Ascorbate lasts 181 days: 181 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 8 Ounce(s); 226.8 Gram(s) |
| Serving size as filed | 1.25 Gram(s) (.25 Rounded Teaspoon) |
| Servings per container | 181 |
| Servings per day in the directions | 1 |
| Days per bottle | 181 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 274897 · label 2022-11-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "16% Daily Value" mean here, and does it recompute?
The label declares 16% Daily Value; 68 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 16%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 16% | 420 mg | 16% |
Source · NIH DSLD 274897; 21 CFR 101.9 · label 2022-11-22 · 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?
Other ingredients are not present in the filed record for Source Naturals Magnesium Ascorbate as of 2026-11-02.
measured| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
| Target group | Dairy Free |
| Target group | Sugar Free |
Source · NIH DSLD 274897 · label 2022-11-22; 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?
Source Naturals has 6 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Source Naturals 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-0100-2014 | 2013-11-13 | The firm found small piece of metal fragment in one tablet during its inspection process. | Terminated |
| F-1100-2014 | 2013-12-25 | Dietary Supplements were made with bulk products provided by National Enzyme Company which are currently under recall for chloramphenicol | Terminated |
| F-2178-2017 | 2017-05-10 | Testing of Vitamin D-3 as a result of a consumer complaint found specific lots to have lower concentrations than product specifications of ingredient labeling. | Terminated |
| F-2380-2017 | 2017-07-19 | Dietary supplements contain low levels of undeclared boron | Terminated |
| F-2383-2017 | 2017-07-19 | Dietary supplements contain low levels of undeclared boron | 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 274897 · label 2022-11-22; 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 274897 · label 2022-11-22; 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 274897 (label 2022-11-22, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 4 gaps remain: Single-salt capacity audit excluded as of 2026-10-17: one salt with a defined elemental fraction is not resolved.; No US retail price matched as of 2026-11-02 (barcode 0 21078 00834 7); A single salt with a defined elemental fraction is unresolved as of 2026-11-02; Other ingredients are not present in the filed record as of 2026-11-02. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 274897 |
| Scanned label (PDF) | Label 274897 scan |
| Label date | 2022-11-22 |
| Date entered into DSLD | 2022-11-22 |
| Barcode (UPC) as filed | 0 21078 00834 7 |
| Manufactured for | Source Naturals, Inc., Santa Cruz, CA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
15 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | Structure/Function |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Other | Immune system support |
| Suggested/Recommended/Usage/Directions | Suggested Use: A rounded 1/4 teaspoon daily, mixed in water or juice as desired, preferably with a meal. |
| Storage | Keep dry, away from heat and direct sunlight. Always replace cap. Do not refrigerate. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Note: If you are pregnant, may become pregnant, or breastfeeding, consult your health care professional before using this product. |
| Precautions re: All Other | Do not use if either tamper-evident seal is broken or missing. |
| Precautions re: Children | Keep out of the reach of children. |
| Formula re: Contains | Magnesium ascorbate is non-acidic (pH neutral) and gentle on the digestive system. Vitamin C plays a vital role in collagen formation, amino acid metabolism, hormone synthesis, and the body's immune system. Magnesium is an essential mineral, playing a key role in over 300 enzymatic reactions in metabolism. These reactions include those involved in the Krebs cycle (one of the body's main energy production processes), energy storage, the breakdown of fatty acids, protein synthesis, DNA metabolism, the relaxation of both voluntary and involuntary muscle tissue, neurotransmitter activity, and hormone regulation. Magnesium is stored primarily in the bones, and plays a role in bone formation. |
| Formulation re: Vegetarian/Vegan | Suitable for vegetarians. |
| Formulation re: Does NOT Contain | Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, salt, preservatives, or artificial color, flavor or fragrance. |
| 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. |
| Brand IP Statement(s) re: (c), (TM), (SM) | Copyright SOURCE NATURALS, INC. |
| Physical state | Powder |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 274897 · label 2022-11-22; 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.