Label arithmetic · NIH DSLD 24654
Kirkman Magnesium Glycinate Bio-Max Series: 100 mg of magnesium per capsule, 3 capsules a day, $42.75 a month
100 mg of magnesium per capsule; the label's 3 capsules a day cost $42.75 a month (Amazon, Nov 2). Inside: salt weight, capsule size, price rank.
Kirkman Magnesium Glycinate Bio-Max Series declares 100 mg of elemental magnesium per serving as glycinate, which needs 709–845 mg of magnesium glycinate in each capsule, against 730 mg in a size 00 capsule at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range: it needs size 00 or larger. Observed at $0.4750 per 100 mg, rank 17 of 17 ranked glycinate offers (1 = lowest price per 100 mg), percentile 100 (lower = lower price). NIH DSLD 24654, label dated 2013-08-23.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| 545 mg |
| 730 mg |
| 1,100 mg |
| 709–845 mg of glycinate per capsule |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-11-02 · chemistry 2026-10-17
Mass: 709–845 mg per capsule · Price: $0.4750 per 100 mg · % DV: 25% 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.
Will 100 mg of glycinate actually fit in one capsule, or do I need more than one?
Estimated salt mass versus assumed capsule capacity: Kirkman Magnesium Glycinate Bio-Max Series implies 709–845 mg of magnesium glycinate in each capsule to deliver 100 mg of elemental magnesium, against 1,100 mg in the largest standard capsule (size 000) at powder density 0.8 g/mL, the top of the usual 0.6–0.8 range. Verdict: needs size 00, read at the most favourable hydration and the most units per serving.
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 capsule | 709–845 mg |
| Capsule capacity 0 · 00 · 000 | 545 · 730 · 1,100 mg |
| Verdict | Needs size 00 |
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 24654 · label 2013-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Kirkman Magnesium Glycinate Bio-Max Series files 1 magnesium line in NIH DSLD 24654; 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 24654 · label 2013-08-23; 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; at that salt the declaration is within the assumed size 000 capacity at powder density 0.8 g/mL, 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 24654 · label 2013-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Is this a good price for the elemental magnesium I'm actually getting?
Kirkman Magnesium Glycinate Bio-Max Series costs $0.4750 per 100 mg of elemental magnesium at the price observed 2026-11-02, rank 17 of 17 ranked glycinate offers (1 = lowest price per 100 mg), percentile 100 (lower = lower price), against a same-salt median of $0.1889; prices observed 2026-10-26 to 2026-11-02.
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 |
| 17 | Kirkman Magnesium Glycinate Bio-Max Series (this label) | $0.4750 | 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, Kirkman Magnesium Glycinate Bio-Max Series lasts 33 days: 100 servings against 3 servings a day in the filed directions. $42.75 a month at the label's suggested use (3 capsules a day) and $59.85 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 | 100 Capsule(s) |
| Serving size as filed | 1 Capsule(s) |
| Servings per container | 100 |
| Servings per day in the directions | 3 |
| Days per bottle | 33 days |
| Cost a month at the label suggested use | $42.75 a month at the label's suggested use (3 capsules a day) |
| $ per 30 days at 420 mg Daily Value | $59.85 |
Source · NIH DSLD 24654 · label 2013-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "25% Daily Value" mean here, and does it recompute?
The label declares 25% 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 | 25% | 420 mg | 24% |
Source · NIH DSLD 24654; 21 CFR 101.9 · label 2013-08-23 · 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?
Kirkman Magnesium Glycinate Bio-Max Series files 3 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 | Magnesium Glycinate(R) |
| 2 | L-Leucine |
| 3 | Plant Cellulose Capsule |
| Shell | vegetarian |
| Target group | Adult (18 - 50 Years) |
| Target group | No Allergies |
| Target group | Gluten Free |
| Target group | Dairy Free |
1 additional rows
| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Sugar Free |
Source · NIH DSLD 24654 · label 2013-08-23; 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?
Kirkman has 13 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Kirkman 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-0790-2014 | 2013-12-25 | Firm is recalling dietary supplements containing a raw material which may contain >0.3 ppb chloramphenicol | Terminated |
| F-0757-2014 | 2013-12-25 | Firm is recalling dietary supplements containing a raw material which may contain >0.3 ppb chloramphenicol | Terminated |
| F-0762-2014 | 2013-12-25 | Firm is recalling dietary supplements containing a raw material which may contain >0.3 ppb chloramphenicol | Terminated |
| F-0747-2014 | 2013-12-25 | Firm is recalling dietary supplements containing a raw material which may contain >0.3 ppb chloramphenicol | Terminated |
| F-0792-2014 | 2013-12-25 | Firm is recalling dietary supplements containing a raw material which may contain >0.3 ppb chloramphenicol | 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 24654 · label 2013-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Which labels are closest to this one, with the same salt and dose?
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 |
| 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 245308) | 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 24654 · label 2013-08-23; 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 24654 (label 2013-08-23, 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 24654 |
| Label date | 2013-08-23 |
| Date entered into DSLD | 2013-08-23 |
| Barcode (UPC) as filed | Not filed as of 2026-11-02 |
| Manufactured exclusively by | Kirkman, Lake Oswego, OR |
| Claim category as filed | All Other |
| Precautions re: All Other | CAUTION: MAGNESIUM SUPPLEMENTS CAN CAUSE CHANGES IN STOOL CONSISTENCY AND BOWEL HABITS. IF THIS OCCURS, DISCONTINUE USE AND DISCUSS THIS MATTER WITH YOUR PHYSICIAN. |
| Formula re: Type | HYPOALLERGENIC |
12 additional rows
| Field | As filed |
|---|---|
| General: Product/Version Code | 096/100 |
| General Statements: All Other Content | 0096-100 |
| Formulation re: Does NOT Contain | FREE OF: Sugar, starch, soy, wheat, casein, gluten, milk, preservatives, yeast, gelatin, flavorings, or colorings. |
| Storage | IMPORTANT: STORE IN A COOL DRY PLACE AND TIGHTLY CAPPED. |
| Precautions re: Children | KEEP OUT OF THE REACH OF CHILDREN. |
| General Statements: All Other Content | Best Used by: May 2013 |
| Formulation re: Does NOT Contain | CASEIN & GLUTEN FREE |
| Suggested/Recommended/Usage/Directions | SUGGESTED USE: 1 capsule, three times daily or as directed by a physician. Capsules may be pulled apart and the contents mixed with food or beverages. |
| General Statements: All Other Content | (503)694-1600 |
| Brand IP Statement(s) re: (c), (TM), (SM) | Magnesium Glycinate(R) is a registered trademark of Albion. |
| Physical state | Capsule |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 24654 · label 2013-08-23; 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.