Label arithmetic · NIH DSLD 220953
Natural Factors Magnesium Bisglycinate 200 mg: 200 mg of magnesium per 2.4 gram, 50 servings
200 mg of magnesium in each 2.4 gram, about 50 servings per 4.2 Ounce. Glycinate is 11.8–14.1% magnesium. Inside: salt per scoop, %DV check.
Natural Factors Magnesium Bisglycinate 200 mg was observed at $13.97 on 2026-11-02 for 50 servings of 200 mg elemental magnesium as glycinate: $0.1397 per 100 mg, rank 7 of 17 ranked glycinate offers (1 = lowest price per 100 mg), percentile 41 (lower = lower price) (median $0.1889, ranked prices observed 2026-10-26 to 2026-11-02). NIH DSLD 220953, label dated 2020-05-22.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 3,413 |
| orotate |
| 2,751 |
| L-threonate |
| 2,424 |
| taurate |
| 2,242 |
| lactate |
| 1,665 |
| glycerophosphate |
| 1,600 |
| glycinate |
| 1,418 |
| malate |
| 1,287 |
| aspartate |
| 1,279 |
| citrate |
| 1,238 |
| sulfate |
| 991 |
| chloride |
| 783 |
| carbonate |
| 694 |
| hydroxide |
| 480 |
| oxide |
| 332 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-11-02 · chemistry 2026-10-17
Mass: 1,418–1,691 mg per serving · Price: $0.1397 per 100 mg · % DV: 48% vs 48%
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 glycinate powder is in one scoop?
Natural Factors Magnesium Bisglycinate 200 mg carries 1,418–1,691 mg of magnesium glycinate per serving for 200 mg of elemental magnesium, against 1,100 mg in the largest standard capsule; capsule capacities do not apply to this powder.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 200 mg |
| Units per serving | Not a discrete unit as of 2026-11-02 |
| Magnesium glycinate per serving | 1,418–1,691 mg |
| Magnesium glycinate per serving | Not computable as of 2026-11-02 |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Capsule sizes do not apply |
The filed salt can have more than one hydration state (bisglycinate; chelate hydration varies by supplier), so the compound mass is a range.
Source · NIH DSLD 220953 · label 2020-05-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Natural Factors Magnesium Bisglycinate 200 mg files 1 magnesium line in NIH DSLD 220953; the selected primary line declares 200 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 |
|---|---|---|
| 200 mg | bisglycinate · Magnesium (Form: as Magnesium Bisglycinate) | Primary serving |
Source · NIH DSLD 220953 · label 2020-05-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's glycinate claim hold up, or could the magnesium come from another source?
The label names one magnesium form, glycinate, 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 glycinate | 11.8–14.1% | filed magnesium line |
Source · NIH DSLD 220953 · label 2020-05-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
Natural Factors Magnesium Bisglycinate 200 mg costs $0.1397 per 100 mg of elemental magnesium at the price observed 2026-11-02, rank 7 of 17 ranked glycinate offers (1 = lowest price per 100 mg), percentile 41 (lower = lower price), against a same-salt median of $0.1889; prices observed 2026-10-26 to 2026-11-02. First observed 2026-10-19 at $13.97, latest 2026-11-02 at $13.97, 3 observations.
computed
Chart data
| Displayed chart text |
|---|
| n=17 |
| P25 $0.1338 |
| P75 $0.2216 |
| median $0.1889 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | Amazon Elements Chelated Magnesium 270 mg | $0.0666 | 2026-11-02 |
| 2 | Solgar Chelated Magnesium | $0.0930 | 2026-11-02 |
| 3 | tnvitamins Magnesium Glycinate 300 mg | $0.0962 | 2026-11-02 |
| 4 | New Chapter Magnesium + Ashwagandha | $0.1229 | 2026-11-02 |
| 5 | Windmill Magnesium Glycinate 200 mg | $0.1338 | 2026-11-02 |
| 7 | Natural Factors Magnesium Bisglycinate 200 mg (this label) | $0.1397 | 2026-11-02 |
| Median | 17 ranked glycinate offers | $0.1889 | 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, Natural Factors Magnesium Bisglycinate 200 mg lasts 50 days: 50 servings against 1 serving a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 4.2 Ounce(s); 120 Gram(s) |
| Serving size as filed | 2.4 Gram(s) (1 scoop) |
| Servings per container | 50 |
| Servings per day in the directions | 1 |
| Days per bottle | 50 days |
| $ per 30 days at one label serving a day | $8.38 |
| $ per 30 days at 420 mg Daily Value | $17.60 |
Source · NIH DSLD 220953 · label 2020-05-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "48% Daily Value" mean here, and does it recompute?
The label declares 48% Daily Value; 200 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 48%, the same within one point.
computed| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 48% | 420 mg | 48% |
Source · NIH DSLD 220953; 21 CFR 101.9 · label 2020-05-22 · 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?
Natural Factors Magnesium Bisglycinate 200 mg files 1 other ingredient, and no magnesium stearate, against 28 of 73 glycinate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Citric Acid |
| Target group | Vegan |
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
| Target group | Dairy Free |
| Target group | Sugar Free |
Source · NIH DSLD 220953 · label 2020-05-22; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about glycinate, and about side effects?
6 studies in the PubMed-checked registry measured outcomes involving glycinate; 2 mention gastrointestinal or adverse outcomes. They measured the salt, not this label.
measured| Year | Study | PubMed |
|---|---|---|
| 2024 | Comparative Clinical Study on Magnesium Absorption and Side Effects After Oral Intake of Microencapsulated Magnesium (MAGSHAPE™ Microcapsules) Versus Other Magnesium Sources. | 39770988 |
| 2024 | The bioaccessibility and tolerability of marine-derived sources of magnesium and calcium. | 38608850 |
| 2020 | Dose-Dependent Absorption Profile of Different Magnesium Compounds | 30761462 |
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?
Natural Factors has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Natural Factors 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 |
|---|---|---|---|
| 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 220953 · label 2020-05-22; 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 220953 · label 2020-05-22; 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 220953 (label 2020-05-22, snapshot 2026-08-10), a price observed 2026-11-02 and the chemistry model of 2026-09-13. No data gap remains for the computed fields. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 220953 |
| Label date | 2020-05-22 |
| Date entered into DSLD | 2020-05-22 |
| Barcode (UPC) as filed | 0 68958 01642 9 |
| Manufactured by | Natural Factors Canada |
| Distributed by | Natural Factors, Monroe, WA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
18 additional rows
| Field | As filed |
|---|---|
| Claim category as filed | Structure/Function |
| Seals/Symbols | isura Non-GMO - Mass Spec Documentation Lab tested |
| Suggested/Recommended/Usage/Directions | Suggested usage: Take 1 scoop (2.4 g) mixed with water or juice once per day or as directed by a health professional. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Cautions: As with any supplement, consult your health professional before use if you are pregnant, breastfeeding, or trying to conceive, or if you are taking medication, have a medical condition, or anticipate a surgery. |
| Precautions re: Children | Keep out of the reach of children. |
| Formula re: Contains | Magnesium is essential to the proper functioning of many of the body's systems. it helps to maintain proper muscle function, supports the nervous system, helps in tissue formation and aids in energy production. "Magnesium Bisglycinate supports easier digestive absoprtion of magnesium". |
| Formulation re: Other | Manufactured by Natural Factors to ensure safety and potency in accordance with Good Manufacturing Practices (GMP) of the FDA and Health Canada. |
| Formulation re: Does NOT Contain | Contains no artificial colors, preservatives, or sweeteners; no dairy, starch, sugar, wheat, gluten, yeast, soy, corn, egg, fish, shellfish, animal products, salt, tree nuts, or GMOs. |
| Formulation re: Vegetarian/Vegan | Suitable for vegetarians/vegans. |
| Precautions re: All Other | Sealed for your protection. Do not use if seal is broken. |
| Storage | For freshness, store in a cool, dry place. |
| 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. |
| FDA Statement of Identity | Dietary Supplement |
| Formulation re: Other | Nervous system support Easy on the stomach |
| Brand IP Statement(s) re: (c), (TM), (SM) | isura is a trademark of ISURA. |
| General Statements: All Other Content | Product of Canada Recyclable container and label. |
| Physical state | Powder |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 220953 · label 2020-05-22; 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.