Vagus Nerve Stimulation – Nurosym, Gammacore, Pulsetto and Sensate reviewed and compared
A comprehensive overview of four VNS devices (though one doesn’t actually perform Vagus Nerve stimulation at all) by Health Scientific Institute.
These devices have become popular, but they can also be very expensive, once monthly subscriptions are considered.
People with ME and Long Covid should also take care to choose a device with a variable stimulation level, else stimulation given can cause unwanted side effects or unexpected increase of symptoms.