Yerba Mate has shown promise as a treatment for the seizures caused from epilepsy. This is accomplished because yerba mate acts as an anticonvulsant and appears to protect the brain from neural damage caused by the seizures.
Yerba Mate & Epilepsy Research
Yerba Mate Anticonvulsant: Cdos B, et al. Anticonvulsant, neuroprotective and behavioral effects of organic and conventional yerba mate (Ilex paraguariensis St. Hil.) on pentylenetetrazol-induced seizures in Wistar rats. Brain Research Bulletin (2013)