Magnesium at the NMDA Receptor: The Voltage-Dependent Gatekeeper of Synaptic Plasticity and Cognitive Aging
Magnesium is not just a generic mineral — it is the voltage-dependent plug inside every NMDA receptor. When intracellular Mg²⁺ falls, the gate fails, glutamate becomes excitotoxic, and synaptic plasticity collapses.
