How does stem cell therapy help Parkinson’s?

My brother had stem cell treatment in Mexico and that was waist of money

I saw a lady on Facebook about a year ago who had stem cell. She was filmed before and after and there was an improvement her tremors and walking. I don’t believe it was fake. She was desperate for help. I know stem cell of American has helped some people. If I had the money, I would try it. They do offer services in Mexico. I lived in San Diego 51 yrs and I had friends that went down there for dentist, and other things. Some San Diego doctor do offer services there simply for people who can’t pay the America fees.

Oh. Thank you for the answer.