Vitamatic Magtein Magnesium L-Threonate 2000 mg with D3

What the brand says

Sold as “Vitamatic Magtein Magnesium L-Threonate 2000 mg with D3 – 90 Vegetarian Capsules – Brain Support, Memory & Focus Supplement – Highly Absorbable Magnesium – Non-GMO, Gluten Free, Made in USA”