Magnesium L-threonate, with CAS number 778571-57-6, is a chelated compound formed from magnesium and L-threonic acid. It is a specific salt form of magnesium designed for enhanced bioavailability. Its primary and most well-documented application is as a dietary supplement and nutritional ingredient. It is specifically researched and marketed for its potential to elevate brain magnesium levels and support cognitive functions, including memory and learning. Due to this targeted health benefit, it is widely used in nutraceutical and functional food formulations. As a source of bioavailable magnesium, it also falls under the category of mineral supplements used in food fortification. Its use is driven by the need for highly absorbable magnesium compounds in products aimed at addressing dietary deficiencies and supporting neurological health.