http://www.webs.uidaho.edu/wisui/Kau...lar%20Iron.pdf
I didn't have the stamina to read the above long article which may shed light on the subject.
Interestingly, my blood test done after starting sinemet showed deficiency in iron and my family doctor perscribed iron tablets which I took for one month.
I always assumed that iron increases oxidative stress. but I realise now that iron is vital and it is delicately kept in balance by the cell.
Imad