most drugs associated with the "PD space" have made this claim. Its the law of pharma marketing.

I even remember having the same claims being made for DBS and L-dopa.

Antioxidents, nicotine, caffeine, meeting the previous Pope, etc, all have claimed to delay PD, (or cure it in the case of the Pope). I tend to rely on the advice of forum members like Ron and Everitt.

Take care,
Neil.