Black tea helps in one Parkinson’s type, but soda and pesticides worsen another

A large longitudinal study found that pesticide exposure and caffeinated soda intake were linked to more severe motor symptoms in idiopathic Parkinson’s disease (iPD). In contrast, black tea consumption was associated with milder symptoms in patients with LRRK2-related Parkinson’s disease (LRRK2-PD).
June 17, 2025