Nutricost Magtein®, Magnesium L-Threonate, 90 Capsules (666 mg per Capsule)
UPC: 810139574316
Nutricost Magnesium L-Threonate is formulated to support cognitive health using Magtein®, a patented form of magnesium l-threonate. Each serving provides 2,000 mg of Magtein®, delivering 144 mg of elemental magnesium, which aligns with the dosage used in some clinical research on this specific compound.
This product is made with Magtein®, a trademarked ingredient developed for its ability to cross the blood-brain barrier, as noted in manufacturer materials. It undergoes third-party testing by ISO-accredited laboratories and is produced in a GMP-compliant facility in the USA with globally sourced ingredients. The capsules are vegetarian-friendly and free from gluten and GMOs, with a 90-count bottle offering 30 servings.
Available in a 90-capsule size, it also comes in a 120-capsule variant. Certifications include Non-GMO and Vegetarian, reflecting common quality standards for this category.
At a glance
Supplement Facts
| Ingredient | Amount Per Serving | % Daily Value |
|---|---|---|
| Magnesium | 144 mg | 34% |
| Magtein® | 2,000 mg | ** |
| † Daily Value not established | ||
Other Ingredients
Hypromellose (cellulose) capsule, microcrystalline cellulose, magnesium stearate (vegetable source), silica.
Made and quality tested in the USA with globally sourced ingredients.
Certifications & Claims
Label Information
Directions, warnings, and other information directly from the product label.
Suggested Use
As a dietary supplement, take 3 capsules daily (take 1 capsule in the morning and take 2 capsules 2 hours before sleeping) with 8-12 oz of water or as directed by your healthcare professional. Two capsules at night is recommended in the first week of taking Magtein®. Do not exceed 4g Magtein® per day.
Warning
For healthy individuals 18 years and older. 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. Not recommended for children or women who are pregnant or breastfeeding. Consult a healthcare professional prior to use if you are taking prescription medication, or have a medical condition. Keep out of reach of children. Do not use if safety seal is broken or missing.Store in a cool, dry place.
Product Info
- Brand
- Nutricost
- UPC
- 810139574316
- Package Qty
- 90 count
- Dimensions
- 4.35 x 2.35 x 2.35 in
- Shipping Weight
- 0.25 lb
- First Available
- 01/2025




