Label arithmetic · NIH DSLD 203803
Amazon Elements Chelated Magnesium 270 mg: 135 mg of magnesium per tablet, 2 tablets a day, $5.40 a month
135 mg of magnesium per tablet; the label's 2 tablets a day cost $5.40 a month (Amazon, Nov 2). Inside: salt weight, %DV check, price rank.
Amazon Elements Chelated Magnesium 270 mg was observed at $21.59 on 2026-11-02 for 120 servings of 270 mg elemental magnesium as glycinate: $0.0666 per 100 mg, rank 1 of 17 ranked glycinate offers (1 = lowest price per 100 mg), percentile 6 (lower = lower price) (median $0.1889, ranked prices observed 2026-10-26 to 2026-11-02). NIH DSLD 203803, label dated 2019-06-24.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 4,608 |
| orotate |
| 3,714 |
| L-threonate |
| 3,273 |
| taurate |
| 3,027 |
| lactate |
| 2,248 |
| glycerophosphate |
| 2,160 |
| glycinate |
| 1,915 |
| malate |
| 1,737 |
| aspartate |
| 1,726 |
| citrate |
| 1,671 |
| sulfate |
| 1,337 |
| chloride |
| 1,058 |
| carbonate |
| 937 |
| hydroxide |
| 648 |
| oxide |
| 448 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-11-02 · chemistry 2026-10-17
Mass: 957–1,141 mg per tablet · Price: $0.0666 per 100 mg · % DV: 68% vs 64%
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 is pressed into one tablet?
Amazon Elements Chelated Magnesium 270 mg carries 1,915–2,282 mg of magnesium glycinate per serving for 270 mg of elemental magnesium, against 1,100 mg in the largest standard capsule; capsule capacities do not apply to this tablet or pill.
computed with assumption| Measure | Value |
|---|---|
| Elemental magnesium per serving | 270 mg |
| Units per serving | 2 |
| Magnesium glycinate per serving | 1,915–2,282 mg |
| Magnesium glycinate per tablet | 957–1,141 mg |
| 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 203803 · label 2019-06-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Amazon Elements Chelated Magnesium 270 mg files 1 magnesium line in NIH DSLD 203803; the selected primary line declares 270 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 |
|---|---|---|
| 270 mg | glycinate · Magnesium (Form: as Magnesium Glycinate Chelate) | Primary serving |
Source · NIH DSLD 203803 · label 2019-06-24; 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 203803 · label 2019-06-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
Amazon Elements Chelated Magnesium 270 mg costs $0.0666 per 100 mg of elemental magnesium at the price observed 2026-11-02, rank 1 of 17 ranked glycinate offers (1 = lowest price per 100 mg), percentile 6 (lower = lower price), against a same-salt median of $0.1889; prices observed 2026-10-26 to 2026-11-02. First observed 2026-08-10 at $21.59, latest 2026-11-02 at $21.59, 7 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 |
| 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, Amazon Elements Chelated Magnesium 270 mg lasts 120 days: 120 servings against 1 serving a day in the filed directions. $5.40 a month at the label's suggested use (2 tablets a day) and $8.39 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 | 240 Tablet(s) |
| Serving size as filed | 2 Tablet(s) |
| Servings per container | 120 |
| Servings per day in the directions | 1 |
| Days per bottle | 120 days |
| Cost a month at the label suggested use | $5.40 a month at the label's suggested use (2 tablets a day) |
| $ per 30 days at 420 mg Daily Value | $8.39 |
Source · NIH DSLD 203803 · label 2019-06-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "68% Daily Value" mean here, and does it recompute?
The label declares 68% Daily Value; 270 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 64%, a difference of 4 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 |
| 64 · 68 |
| Declared vs |
| recomputed % DV |
| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 68% | 420 mg | 64% |
Source · NIH DSLD 203803; 21 CFR 101.9 · label 2019-06-24 · release 2026-08-10-f441aa9f · CSV · method
Why does this label contain magnesium stearate, what shell is it, and who is it filed for?
Amazon Elements Chelated Magnesium 270 mg files 6 other ingredients, including magnesium stearate (reference fraction 4.1% magnesium; no quantity filed, so it is not added to the total) and a vegetarian shell, against 28 of 73 glycinate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Microcrystalline Cellulose |
| 2 | Stearic Acid |
| 3 | Vegetable Coating |
| 4 | Croscarmellose Sodium |
| 5 | Magnesium Stearate |
| 6 | Silicon Dioxide |
| Shell | vegetarian |
| Target group | Vegan |
3 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | Gluten Free |
Source · NIH DSLD 203803 · label 2019-06-24; 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?
Amazon Elements has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Amazon Elements 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 203803 · label 2019-06-24; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
5 labels use the same resolved glycinate within ±10% of this label's 135 mg per unit, compared side by side on price and capsule verdict.
computed| Label | Elemental per unit | Price | Verdict |
|---|---|---|---|
| The Vitamin Shoppe Magnesium Glycinate 400 mg (DSLD 201832) | 133 mg | $34.99 · 2026-11-02 | Capsule sizes do not apply |
| The Vitamin Shoppe Magnesium Glycinate 400 mg (DSLD 201834) | 133 mg | $19.99 · 2026-11-02 | Capsule sizes do not apply |
| Woodstock Vitamins Magnesium Glycinate 400 mg | 133 mg | No price | Needs size 000 |
| Metabolic Maintenance Magnesium Glycinate (DSLD 25018) | 125 mg | No price | Needs size 000 |
| Metabolic Maintenance Magnesium Glycinate (DSLD 274078) | 125 mg | $42.50 · 2026-11-02 | Needs size 000 |
Source · NIH DSLD 203803 · label 2019-06-24; 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 203803 (label 2019-06-24, 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 203803 |
| Label date | 2019-06-24 |
| Date entered into DSLD | 2019-06-24 |
| Barcode (UPC) as filed | 8 42379 14624 4 |
| Distributed by | Amazon.com Services, Inc., Seattle, WA |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| General Statements: All Other Content | Made in the U.S.A. from U.S. and imported ingredients |
12 additional rows
| Field | As filed |
|---|---|
| Precautions re: Pregnant or Nursing or Prescription Medications | Caution: As with any dietary supplement, consult your healthcare practitioner before using this product, especially if you are pregnant, nursing, anticipate surgery, take medication on a regular basis or are otherwise under medical supervision. |
| Precautions re: Children | Keep out of reach of children. |
| Precautions re: All Other | For adult use only. Do not use if seal is broken or missing. |
| Storage | Store in a cool, dry place. |
| Suggested/Recommended/Usage/Directions | Suggested use: Take 2 tablets daily. |
| Formulation re: Does NOT Contain | No Artificial Colors or Flavors No Chemical Preservatives Gluten Free |
| Formulation re: Vegetarian/Vegan | Vegan |
| Formula re: Contains | Chelated Magnesium 270 mg per serving |
| General Statements: All Other Content | Transparency To learn about the quality, purity, and potency of your product, scan with your Amazon mobile app. |
| FDA Statement of Identity | Dietary Supplement |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 203803 · label 2019-06-24; 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.