Magnesium L-Threonate is one kind of salt of threonate whose acid is derived from plants. The L-isomer is a metabolite of ascorbic acid (vitamin C). One study suggested that because L-threonate inhibits DKKI expression in vitro, it may have potential in treatment of androgenic alopecia. can greatly enhance learning and memory and mitigate anxiety. It can also be used in food or as a nutritional supplement.