Lectins from beans, such as phytohemagglutinin in kidney beans, may move from the gut to the brain, accumulate in movement centers, and potentially cause Parkinson's-like behaviors.

“whereby lectins from a number of beans specifically phytohemoglutinin and red and black kidney beans was introduced into these animals and then tagged with a green fluorescent protein and you can see this phytohemoglutinum moving from the god of the worms or the mice and rats to the brains of these animals and then accumulating in the substantia Niagara the movement centers of the brain and the Animals then exhibiting Parkinson's like behaviors in response to lectins”