Natural Health Products for Symptomatic Relief of Parkinson's Disease: Prevalence, Interest, and Awareness.

Background: Natural health products have emerged as a potential symptomatic therapeutic approach for people with Parkinson's disease (PD).

Objective: To determine the prevalence of natural health product use, interest in natural health products, awareness of potential herb-drug interactions, and consultation of healthcare professionals regarding natural health products use among people with PD.

Methods: Cross-sectional 4-item survey embedded in the PRIME-NL study, which is a population-based cohort of PD.