Regenerative neurologist Siddharthan Chandran describes the science behind neurodegenerative diseases like Alzheimer’s and MS–using a real-life case study from his clinic named John. John’s MS progressed unusually fast, showing Dr. Chandran the need for more research into speeding up the pace of brain tissue repair. Finally, Dr. Chandran explains the latest developments in treatment and drug use, and how stem cells may be the future of regenerative brain science.