Several studies indicate that synaptic connections in the brain hippocampus, a critical brain region for learning and memory, decline during the normal process of aging. Lower levels of magnesium have been found in the brains of those with Alzheimer's Disease as well. NeuroMag™, which uses the unique, patented, chelated mineral Magtein™, contains magnesium which is chelated to threonic acid (magnesium L-threonate). It is superior to other forms of magnesium at getting through the blood brain barrier because it is able to transport magnesium ions across lipid membranes, including those of brain cells. This improved transport manifests as improved synaptic plasticity as well as NMDA (N-Methyl-D-aspartate) receptor-dependent signaling.