Kappa Nutrition Magbrain Magnesium L-Threonate
- Supplement Type: Magnesium
- Form: Capsule
- Diet: Vegan
- Count: 120
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
Buyers seeking magnesium's brain and sleep benefits specifically will find the L-threonate form and stated elemental dose reassuring, even with the three-capsule serving.
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ASIN: B08MTNZH1LCategory: Magnesium Supplements
Overview
Kappa Nutrition's magnesium L-threonate capsule, marketed under the MagbrainTM name, provides 420 mg of elemental magnesium from 2,253 mg of compound across a three-capsule serving, 120 vegan capsules per bottle, aimed at brain, sleep and muscle support.
Magnesium L-threonate is a form studied for its ability to cross the blood-brain barrier more readily than other magnesium types, which is why it is marketed toward brain and sleep support rather than general mineral supplementation. The three-capsule serving size means the 120-count bottle provides about 40 servings, not 120 days of use.
- 420 mg elemental magnesium per 3-capsule serving
- Magnesium L-threonate (MagbrainTM) form
- 120 vegan capsules per bottle
- Marketed for brain, sleep and muscle support
Who it's for
For people specifically seeking magnesium's cognitive or sleep-support angle rather than a general-purpose mineral supplement, and who do not mind a three-capsule serving. Not for anyone wanting a single-capsule daily dose.
Pros and cons
- L-threonate form targeted at brain and sleep support
- Elemental magnesium dose clearly stated
- Three-capsule serving means the bottle lasts about 40 days
- Higher-cost magnesium form than glycinate or oxide
Performance notes
Magnesium L-threonate is formulated to raise magnesium levels in the brain more effectively than other magnesium salts, the basis for its use in sleep and cognitive-support products. Delivering 420 mg of elemental magnesium requires three capsules per serving, so the 120-capsule bottle provides roughly 40 servings rather than 120 days.
Specifications
| Brand | Kappa Nutrition |
|---|---|
| Supplement Type | Magnesium |
| Form | Capsule |
| Diet | Vegan |
| Count | 120 |
| Flavor | Unflavored |
| Benefits | Supports Brain Health, Focus, Restful Sleep, Muscle Function, And Energy With A |
Frequently asked questions
How much elemental magnesium is in a serving of Kappa Nutrition's Magnesium L-Threonate (model MAG2617)?
A three-capsule serving provides 420 mg of elemental magnesium from 2,253 mg of the L-threonate compound.
How many servings are in a bottle of Kappa Nutrition Magnesium L-Threonate?
With 120 capsules and a three-capsule serving size, the bottle provides about 40 servings.
Is Kappa Nutrition's Magnesium L-Threonate vegan?
Yes, the capsules are formulated as vegan.