Label arithmetic · NIH DSLD 295977
Source Naturals Magnesium Serene Tangerine & Fruit Medley: 800 mg of magnesium per serving (salt not resolved)
800 mg of magnesium per serving. Salt not resolved from the NIH record; no US price matched (Nov 2). Inside: label lines, ingredients.
Source Naturals Magnesium Serene Tangerine & Fruit Medley declares 800 mg of elemental magnesium per 4.2–8.4 gram(s) (1 to 2 rounded teaspoons); 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 295977, label dated 2023-08-23.
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: 200% vs 190%
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 is in one serving?
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 | 800 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 295977 · label 2023-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Source Naturals Magnesium Serene Tangerine & Fruit Medley files 1 magnesium line in NIH DSLD 295977; the selected primary line declares 800 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 |
|---|---|---|
| 800 mg | Salt not named in this row as of 2026-11-02 | Primary serving |
Source · NIH DSLD 295977 · label 2023-08-23; 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 295977 · label 2023-08-23; 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, 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?
Days per bottle cannot be computed for Source Naturals Magnesium Serene Tangerine & Fruit Medley as of 2026-11-02: the filed directions give no complete daily frequency.
computed| Measure | Value |
|---|---|
| Net contents as filed | 17.6 Ounce(s); 500 Gram(s) |
| Serving size as filed | 4.2–8.4 Gram(s) (1 to 2 rounded teaspoons) |
| Servings per container | 59 |
| Servings per day in the directions | 1 |
| Days per bottle | Not computable as of 2026-11-02 |
| $ 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 295977 · label 2023-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "200% Daily Value" mean here, and does it recompute?
The label declares 200% Daily Value; 800 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 190%, a difference of 10 points. Labels filed under the earlier 400 mg reference, or with a different filing basis, show gaps of this kind.
computed
Chart data
| Displayed chart text |
|---|
| Declared vs recomputed % |
| DV |
| 190 · 200 |
| Declared vs |
| recomputed % DV |
| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 200% | 420 mg | 190% |
Source · NIH DSLD 295977; 21 CFR 101.9 · label 2023-08-23 · 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?
Source Naturals Magnesium Serene Tangerine & Fruit Medley files 7 other ingredients.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Citric Acid |
| 2 | natural Tangerine flavor |
| 3 | Sodium Bicarbonate |
| 4 | Sodium Carbonate |
| 5 | Strawberry |
| 6 | natural Peach flavor |
| 7 | Stevia leaf concentrate |
| Target group | Vegetarian |
4 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
| Target group | Dairy Free |
| Target group | Sugar Free |
Source · NIH DSLD 295977 · label 2023-08-23; 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 295977 · label 2023-08-23; 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 295977 · label 2023-08-23; 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 295977 (label 2023-08-23, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 3 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 02209 1); 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 295977 |
| Scanned label (PDF) | Label 295977 scan |
| Label date | 2023-08-23 |
| Date entered into DSLD | 2023-08-23 |
| Barcode (UPC) as filed | 0 21078 02209 1 |
| Manufacturer | Source Naturals, Inc., Santa Cruz, CA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
19 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | Structure/Function |
| Suggested/Recommended/Usage/Directions | Suggested use: Place 1 to 2 rounded teaspoon of powder in a glass or cup. Add 3-4 ounces of hot or boiling water. Stir until dissolved. Add more warm or cold water as desired and enjoy. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Warning: If you are pregnant, may become pregnant, breastfeeding, have a history of kidney dysfunction, or are taking any prescription drug, consult your health care professional before using this product. |
| Precautions re: All Other | If you experience loose stools, reduce your dosage. If symptoms persist, discontinue use and consult your health care professional immediately. |
| Storage | Store in a cool, dry place. |
| Formulation re: Vegetarian/Vegan | Suitable for vegetarians. |
| Formulation re: Does NOT Contain | Contains no yeast, dairy, egg, gluten, soy or wheat. Contains no sugar, preservatives, or artificial color, flavor or fragrance. |
| Formulation re: Does NOT Contain | Do not use if tamper-evident seal is broken or missing. |
| Precautions re: Children | Keep out of the reach of children. |
| Suggested/Recommended/Usage/Directions | 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. |
| Formulation re: Other | Relaxing drink for daily stress |
| Formula re: Contains | Great tasting tangerine & fruit medley |
| Formula re: Contains | 800 mg magnesium per serving |
| Formulation re: Other | Support for cardiovascular, bone, muscle and brain health |
| FDA Statement of Identity | Dietary Supplement |
| Formula re: Contains | The daily stress of modern life can take its toll on our health. Magnesium is one of the most important minerals for obtaining deep relaxation and maintaining overall wellness. While many are familiar with its oles in heart health, bone strength, and a healthy immune system, fewer people are aware of magnesium's role in muscle relaxation and nervous system balance. During times of stress, magnesium's stores in the body can be depleted. Supplementation with Magnesium serene calms the muscles and nerves. This bioavailable for supports relaxation and at the same time, replenishes this important mineral to the body for all of its benefits, including over 300 enzymatic processes. |
| Brand IP Statement(s) re: (c), (TM), (SM) | Copyright Source Naturals, INC. |
| Physical state | Liquid |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 295977 · label 2023-08-23; 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.