The CliniCrowd website contains comments from people who have been taking mannitol since April, but the website itself was only launched about 3 months ago.

On the question of when some initial results will be available, about 3 weeks ago Ranico at HU said the following:
"We will present the data when it is statistically significant and when we finish the user interface. We expect that to happen in 3-4 month ..."

I found the following information on the PD FAQ page on the CliniCrowd website:
"According to some patients reports so-far:
- After 18-30 days with Mannitol they feel a change;
- 30-60 some observed a slight decrease in symptom improvements and even some regression;
- After 60 days they report steady improvement."