Label arithmetic · NIH DSLD 232390
Nootropics Depot Magtein Magnesium L-Threonate Powder: 144 mg of magnesium per serving
144 mg of magnesium per serving. L-threonate is 8.3% magnesium; no US price matched (Nov 2). Inside: salt per scoop, %DV check.
Nootropics Depot Magtein Magnesium L-Threonate Powder declares 144 mg of elemental magnesium per serving as l-threonate, which means 1,745 mg of magnesium l-threonate powder in one serving, compared with 1,100 mg in the largest standard capsule; that is the weight of the salt alone, before any fillers or flavours in the scoop. No US retail price matched as of 2026-11-02; 2 of the 8 l-threonate labels in this registry have a matched price. NIH DSLD 232390, label dated 2020-08-23.
computed from the filed label
Chart data
| Displayed chart text |
|---|
| gluconate |
| 2,457 |
| orotate |
| 1,981 |
| L-threonate |
| 1,745 |
| taurate |
| 1,614 |
| lactate |
| 1,199 |
| glycerophosphate |
| 1,152 |
| glycinate |
| 1,021 |
| malate |
| 927 |
| aspartate |
| 921 |
| citrate |
| 891 |
| sulfate |
| 713 |
| chloride |
| 564 |
| carbonate |
| 499 |
| hydroxide |
| 345 |
| oxide |
| 239 |
Data release 2026-08-10-f441aa9f · registry snapshot 2026-08-10 · latest price observation 2026-10-19 · chemistry 2026-10-17
Mass: 1,745 mg per serving · Price: none matched · % DV: 36% vs 34%
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 l-threonate powder is in one scoop?
Nootropics Depot Magtein Magnesium L-Threonate Powder carries 1,745 mg of magnesium l-threonate per serving for 144 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 | 144 mg |
| Units per serving | Not a discrete unit as of 2026-11-02 |
| Magnesium l-threonate per serving | 1,745 mg |
| Magnesium l-threonate 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 |
Source · NIH DSLD 232390 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
How much elemental magnesium is actually in this label's filed magnesium lines?
Nootropics Depot Magtein Magnesium L-Threonate Powder files 1 magnesium line in NIH DSLD 232390; the selected primary line declares 144 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 |
|---|---|---|
| 144 mg | threonate · Magnesium (Form: from 200 mg Magtein Magnesium L-Threonate) Note: elemental | Primary serving |
Source · NIH DSLD 232390 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
Does this label's l-threonate claim hold up, or could the magnesium come from another source?
The label names one magnesium form, l-threonate, 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 L-threonate | 8.3% | filed magnesium line |
Source · NIH DSLD 232390 · label 2020-08-23; 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; 2 of 8 l-threonate labels have one, against a median of $1.1572 per 100 mg among 1 ranked l-threonate offer.
computed
Chart data
| Displayed chart text |
|---|
| n=1 |
| median $1.1572 |
| Rank | Label | Per 100 mg | Observed |
|---|---|---|---|
| 1 | Momentous Magnesium Threonate | $1.1572 | 2026-11-02 |
| Median | 1 ranked l-threonate offer | $1.1572 | 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, Nootropics Depot Magtein Magnesium L-Threonate Powder lasts 30 days: 60 servings against 2 servings a day in the filed directions.
computed| Measure | Value |
|---|---|
| Net contents as filed | 4.23 Ounce(s); 120 Gram(s) |
| Serving size as filed | 1–2 mg |
| Servings per container | 60 |
| Servings per day in the directions | 2 |
| Days per bottle | 30 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 232390 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What does "36% Daily Value" mean here, and does it recompute?
The label declares 36% Daily Value; 144 mg against the 420 mg reference in 21 CFR 101.9 recomputes to 34%, a difference of 2 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 |
| 34 · 36 |
| Declared vs |
| recomputed % DV |
| Group as filed | Declared | Reference | Recomputed |
|---|---|---|---|
| Adults and children 4 or more years of age | 36% | 420 mg | 34% |
Source · NIH DSLD 232390; 21 CFR 101.9 · label 2020-08-23 · 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?
Other ingredients are not present in the filed record for Nootropics Depot Magtein Magnesium L-Threonate Powder as of 2026-11-02.
measured| Entry | Filed ingredient or declaration |
|---|---|
| Target group | Adult (18 - 50 Years) |
| Target group | Women (not pregnant or lactating) |
Source · NIH DSLD 232390 · label 2020-08-23; snapshot 2026-08-10 · release 2026-08-10-f441aa9f · CSV · method
What has research measured about l-threonate, and about side effects?
No study in the registry measured l-threonate 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?
Nootropics Depot has 0 FDA recall records matched by brand name in the enforcement data queried 2026-10-19. Nootropics Depot 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 232390 · label 2020-08-23; 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 232390 · label 2020-08-23; 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 232390 (label 2020-08-23, snapshot 2026-08-10) and the chemistry model of 2026-09-13. 2 gaps remain: No US retail price matched as of 2026-11-02; no barcode is filed; Other ingredients are not present in the filed record as of 2026-11-02. The CSV carries the values shown here.
measured| Field | As filed |
|---|---|
| NIH DSLD label | NIH DSLD 232390 |
| Label date | 2020-08-23 |
| Date entered into DSLD | 2020-08-23 |
| Barcode (UPC) as filed | Not filed as of 2026-11-02 |
| Manufactured for | Nootropics Depot, Tempe, AZ |
| Claim category as filed | Nutrient |
| Claim category as filed | All Other |
| Claim category as filed | Structure/Function |
13 additional rows
| Field | As filed |
|---|---|
| FDA Statement of Identity | Dietary Supplement |
| Suggested/Recommended/Usage/Directions | Suggested Use: Take 1000mg twice daily, once in the morning and once in the evening 2 hours before sleep. 1000mg at night only is recommended in the last week of taking Magtein. |
| Precautions re: Pregnant or Nursing or Prescription Medications | Warning: Consult your doctor if taking prescription drugs with Magtein. Not recommended for children nor women who are pregnant or breastfeeding. |
| Precautions re: Children | Keep out of reach of children. Not recommended for children nor women who are pregnant or breastfeeding. Do not take this or any other supplement if under the age of 18 or if you have any known or suspected medical conditions. |
| Precautions re: All Other | Do not use if safety seal is damaged or missing. |
| Suggested/Recommended/Usage/Directions | Maximum dose of 4 grams (4000mg) per day. |
| Precautions re: All Other | Like other magnesium products, Magtein may induce sleepiness, drowsiness or headaches. This may indicate a magnesium deficiency and is temporary. Reduce the dosage, consult a doctor or discontinue use if conditions persist for more than one week. |
| Storage | Keep away from direct sunlight/heat. Store in a cool/dry place. |
| General Statements: All Other Content | Transfer scoops are not accurate forms of measurement. A milligram scale is needed to accurately measure dosages. |
| FDA Disclaimer Statement | This statement has not been evaluated by the FDA. This product is not intended to diagnose, treat, cure or prevent any disease. |
| Brand IP Statement(s) re: (c), (TM), (SM) | Magtein is a trademark of Magceuitics, Inc. and is distributed exclusively by AIDP, Inc. Magtein is protected under US patents 8, 178, 118; 8,142, 803; 8,163, 301; and other pending patents |
| Physical state | Powder |
| Registry snapshot | 2026-08-10 |
Source · NIH DSLD 232390 · label 2020-08-23; 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.