Brain Health

Zinc Acts as a Double-Edged Sword in Hypoglycemic Brain Injury

When blood sugar drops dangerously low, the brain suffers serious damage — and a surprising culprit has emerged: zinc. This review reveals that zinc released from synapses accumulates inside neurons during glucose deprivation, sabotaging mitochondria and triggering oxidative cell death. The damage actually worsens when glucose is restored, as zinc and reactive oxygen species combine to collapse cellular metabolism. Paradoxically, zinc is also essential for brain repair and neurogenesis during recovery. The authors propose a precision-timed treatment strategy: suppress zinc-driven oxidative damage acutely during injury, then restore controlled zinc signaling to support healing. This framework may apply not just to hypoglycemia, but to stroke and other metabolic brain disorders.