Supports Memory and Cognitive Function. Gluten Free, Non GMO, LE Certified, Magtein®. Magnesium is an essential mineral that plays an important role in the brain: it helps support short-term or “working” memory as well as healthy cognitive function. If you’re looking to support mind, memory, and encourage quick thinking, check out Neuro-Mag® Magnesium L-Threonate. Neuro-Mag® Magnesium L-Threonate is our customer-favorite form of brain-friendly magnesium. Magnesium L-Threonate has less of a laxative effect than other forms of magnesium. Enhances Memory and Cognitive Function. Half of the older people in the developed world are magnesium deficient.