I hope that helps! Please let us know. Rooibos also helps to calm and sooth nerves and some studies show some mild reduction in Parkinson symptoms
I know tea has been found to help reduce the chance of getting Parkinsons as well.. specifically Black tea.
Here's some more specific, detailed reading on the subject:
Li FJ, Ji HF, Shen L. A meta-analysis of tea drinking and risk of Parkinson's disease. TheScientificWorldJournal 2012;2012:923464. Qi H, Li S. Dose-response meta-analysis on coffee, tea and caffeine consumption with risk of Parkinson's disease. Geriatrics & gerontology international 2014;14:430-9. Tan LC, Koh WP, Yuan JM, et al. Differential effects of black versus green tea on risk of Parkinson's disease in the Singapore Chinese Health Study. American journal of epidemiology 2008;167:553-60.
You can try to drink the green tea. Because the tea polyphenols in the green tea can increase the brain dopamine components, which plays a role in protecting neurons. That would help preventing from Parkinsons disease.