Hi. My sister was diagnosed with PSP 2 years ago. Like many of you, I have spent time searching the web for any possible thing that may help. I came across is a study done at the University of Miami in 2013 using Mannose (one of the eight essential sugars, derived from Aloe Vera). Below is a link to the interview Dr. John Lewis gave to NewsMax and a report of the study. (sorry, couldn't make the links 'hotlinks' so you will have to copy and paste into your web browzer)
LISTEN TO U of MIAMI DR LEWIS THAT DID THE STUDY--IT'S REALLY INFORMATIVE:
READ THE REPORT OF THE STUDY:
The study was with Alzheimers patients, but I’m hopeful that it may be something beneficial to our PSP loved ones, as well.