Evidence conflicts on iron’s role in Parkinson’s disease
Researchers debate whether too much or too little of heavy metal in the brain raises risk
![nerve cells affected by iron levels in the brain](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2016/05/042616_ls_iron-brain_free.jpg?fit=860%2C460&ssl=1)
RISK FACTOR Pigmented nerve cells (black U-shape, center) in the human brain die in Parkinson’s disease, destruction that may be affected by iron levels.
BrainScape/University of Sydney