Label arithmetic · NIH DSLD 245308
Douglas Laboratories Magnesium Glycinate: 100 mg of magnesium per tablet, 1–4 tablets a day
100 mg of magnesium per tablet; the label's 1–4 tablets a day give 100–400 mg. No US price matched (Nov 2). Inside: salt weight, %DV check.
Douglas Laboratories Magnesium Glycinate declares 100 mg of elemental magnesium per serving as glycinate, which means 709–845 mg of magnesium glycinate pressed into 1 tablet, compared with 1,100 mg in the largest standard capsule; capsule verdicts do not apply to a tablet. No US retail price matched as of 2026-11-02; 17 of the 73 glycinate labels in this registry have a matched price. NIH DSLD 245308, label dated 2021-02-25.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 1,706 |
| orotate |
| 1,376 |
| L-threonate |
| 1,212 |
| taurate |
| 1,121 |
| lactate |
| 833 |
| glycerophosphate |
| 800 |
| glycinate |
| 709 |
| malate |
| 644 |
| aspartate |
| 639 |
| citrate |
| 619 |
| sulfate |
| 495 |
| chloride |
| 392 |
| carbonate |
| 347 |
| hydroxide |
| 240 |
| oxide |
| 166 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 709–845 mg per tablet · 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.
How much glycinate is pressed into one tablet?
Douglas Laboratories Magnesium Glycinate carries 709–845 mg of magnesium glycinate per serving for 100 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 | 100 mg |
| Units per serving | 1 |
| Magnesium glycinate per serving | 709–845 mg |
| Magnesium glycinate per tablet | 709–845 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 245308 · label 2021-02-25; 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 Glycinate files 1 magnesium line in NIH DSLD 245308; 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 | glycinate · Magnesium (Form: as Magnesium Glycinate) | Primary serving |
Source · NIH DSLD 245308 · label 2021-02-25; 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 245308 · label 2021-02-25; 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; 17 of 73 glycinate labels have one, against a median of $0.1889 per 100 mg among 17 ranked glycinate offers.
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, Douglas Laboratories Magnesium Glycinate lasts 30–120 days: 120 servings against 1–4 servings a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 120 Tablet(s) |
| Serving size as filed | 1 Tablet(s) |
| Servings per container | 120 |
| Servings per day in the directions | 1–4 |
| Days per bottle | 30–120 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 245308 · label 2021-02-25; 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 245308; 21 CFR 101.9 · label 2021-02-25 · 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 Glycinate files 6 other ingredients and a vegetarian shell, and no magnesium stearate, against 28 of 73 glycinate labels that list magnesium stearate.
measured| Entry | Filed ingredient or declaration |
|---|---|
| 1 | Hydroxypropyl Cellulose |
| 2 | Ascorbyl Palmitate |
| 3 | Croscarmellose Sodium |
| 4 | Silica |
| 5 | Carnauba wax |
| 6 | Coating |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
1 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Gluten Free |
Source · NIH DSLD 245308 · label 2021-02-25; 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?
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 245308 · label 2021-02-25; 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 glycinate 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 |
|---|---|---|---|
| Vitamin World Albion Chelated Magnesium 700 mg | 100 mg | No price | Capsule sizes do not apply |
| Kirkman Magnesium Glycinate Bio-Max Series | 100 mg | $47.50 · 2026-11-02 | Needs size 00 |
| Douglas Laboratories Magnesium Glycinate (DSLD 55896) | 100 mg | No price | Capsule sizes do not apply |
| The Vitamin Shoppe Magnesium Glycinate 400 mg | 100 mg | $22.99 · 2026-09-21 | Needs size 00 |
| Douglas Laboratories Magnesium Glycinate (DSLD 230442) | 100 mg | No price | Capsule sizes do not apply |
| Douglas Laboratories Magnesium Glycinate (DSLD 245469) | 100 mg | No price | Capsule sizes do not apply |
Source · NIH DSLD 245308 · label 2021-02-25; 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 245308 (label 2021-02-25, 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 97898 6). The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 245308 |
| Label date | 2021-02-25 |
| Date entered into DSLD | 2021-02-25 |
| Barcode (UPC) as filed | 3 10539 97898 6 |
| Label version · Image difference, same product | NIH DSLD 5298 |
| Label version · Image difference, same product | NIH DSLD 8942 |
| Label version · Image difference, same product | NIH DSLD 55895 |
| Label version · Image difference, same product | NIH DSLD 232183 |
22 additional rows
| Field | As filed |
|---|---|
| Label version · Package size difference, same product | NIH DSLD 5298 |
| Label version · Package size difference, same product | NIH DSLD 8942 |
| Label version · Package size difference, same product | NIH DSLD 55895 |
| Label version · Package size difference, same product | NIH DSLD 232183 |
| Label version · Package size difference, same product | NIH DSLD 245469 |
| Label version · Package size difference, same product | NIH DSLD 8944 |
| Label version · Package size difference, same product | NIH DSLD 55896 |
| Label version · Package size difference, same product | NIH DSLD 230442 |
| 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 tablet, 1-4 times daily or as directed by your health 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 | Contents may not fill package in order to accommodate required labeling. Please rely on stated quantity. Scan to learn about our manufacturing excellence |
| FDA Statement of Identity | Dietary Supplement |
| Physical state | Tablet or Pill |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 245308 · label 2021-02-25; 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.