Parkinson's

A new wave of lawsuits alleges that the weedkiller paraquat causes Parkinson's Disease. The evidence continues to undermine this claim.
Lawyers and activists who allege that the weed killer glyphosate causes cancer have moved on to a second target: another herbicide called paraquat. Claiming this chemical can cause Parkinson's Disease, these courtroom crusaders are now suing the herbicide's manufacturers in pursuit of another payday. The science is not on their side.
Conventional wisdom suggests that occupations associated with low socioeconomic status – such as construction, extraction and maintenance jobs – would be linked to the greatest number of ALS and Parkinson's deaths because of workers' environmental exposures to chemicals. But the CDC found the opposite to be true.
Pregnant women are advised to avoid cat litter boxes — so they don't get infected with Toxoplasmosis gondii, which can cause birth defects. Recent research also suggests that this parasite may also be linked to neurodegenerative diseases such as Parkinson's and Alzheimer's.
Two large meta-analyses in JAMA shed light on the link between Alzheimer s disease and amyloid beta (A-β). The key findings indicate that it is likely to take up to 30 years of amyloid deposition before clear signs of dementia are manifest but such deposits are not diagnostic.