Magtein by NOW: DSLD label record for magnesium L-threonate capsules
The NIH DSLD record lists a NOW capsule product called Magtein with 144 mg magnesium and 2 g Magtein (magnesium L-threonate) per labelled serving; it is a label declaration, not proof of efficacy or approval. [1]
Automatic summary · not editorially reviewed
FROM THE ORIGINAL LABEL
A closer look at the product
- Pack contents
- 90 Veg Capsule(s)
- Label serving
- 3 Veg Capsule(s)
- Servings per container
- 30
- Barcode / SKU
- 7 33739 02390 2
Ingredients & declared amounts2
Amounts from the label, per specified serving. These are manufacturer declarations, not a personal dosage recommendation.
| Ingredient | Amount | Per label serving |
|---|---|---|
| Magnesium | 144 mg | 3 Veg Capsule(s) |
| Magtein | 2 Gram(s) | 3 Veg Capsule(s) |
Other ingredients: Hypromellose, Rice Flour, Stearic Acid, Silicon Dioxide
Source: National Institutes of Health, Office of Dietary Supplements · Dietary Supplement Label Database. Label snapshot; packaging and formulation may have changed.
The key findings
DSLD record 335276 describes a NOW capsule product labelled Magtein, entered in the database on 25 September 2025. [1]
The label declares 144 mg magnesium and 2 g Magtein (magnesium L-threonate) per labelled serving. [1]
The record states that DSLD inclusion does not establish efficacy, safety, FDA approval, laboratory verification or current retail availability. [1]
The source at a glance
- Brand
- NOW
- Form
- Capsule
- Pack contents
- 90 Veg Capsule(s)
- Label serving
- 3 Veg Capsule(s)
- Ingredients listed
- Magnesium · Magtein
- Record type / format
- Dietary supplement label/database record
- Scope / context
- The described product: NOW Magtein capsules, as listed in DSLD record 335276.
- Summary based on
- Product label / database record
DSLD record 335276 for the NOW Magtein capsule
This is a record in the NIH Office of Dietary Supplements Dietary Supplement Label Database (DSLD), entry 335276. The label name is Magtein and the declared brand is NOW. The physical form on the label is capsule, and DSLD places the product in the mineral category. The label entered DSLD on 25 September 2025; the record notes this is not a product launch date.
Supporting source [1]
Declared magnesium and Magtein amounts per labelled serving
The record lists two declared ingredients with amounts where available: magnesium at 144 mg per labelled serving, and Magtein, with the labelled form magnesium L-threonate, at 2 grams per labelled serving. These are label facts as entered in the database. The record does not supply independent product testing, a price or a batch certificate.
Supporting source [1]
What DSLD inclusion of this label does not establish
The record states that DSLD inclusion does not establish efficacy, safety, FDA approval, laboratory verification or current retail availability. The amounts are label facts, not personal dosing advice. The snapshot describes label declarations only, so it says nothing about whether the product works or is approved.
Supporting source [1]
How to interpret this
Product label record; not evidence of efficacy or approval. The snapshot covers label declarations only; no independent testing, price, batch certificate or retail availability is supplied.
Based on a product label or database record. This does not establish effectiveness, independent batch testing, approval or current availability.
Source & supporting passages
NOW · dsld.od.nih.gov