A gut-brain link for Parkinson’s gets a closer look
The misfolded proteins may start with microbes in the digestive system
GUT INSTINCT John Carlin (left) was diagnosed with Parkinson’s disease 16 years ago. His wife, Martha (right), founded a company to help research the theory that gut microbes play a role in the disease.
Matt Nager
Martha Carlin married the love of her life in 1995.