Endothelial bioelectric stability is the hidden longevity system — and long-lived species maintain it through glycocalyx-H2S integration

We focus on DNA repair, protein stability, and metabolism. But the endothelium — the single-cell lining of every blood vessel — may be the true bottleneck for organismal longevity. Long-lived species don't just have better hearts and vessels. They maintain stable bioelectric membrane potentials at the endothelial surface, preserving the glycocalyx that prevents chronic vascular inflammation.