Glad you mentioned that Kansas study that tested iron chelation for PPMS over 2 years. It stopped the progression of MS in almost HALF of those who took part and dramatically slowed the progression in the others.
As far as I know vitamin C does not actually chelate iron (as it does mercury, for example) but its antioxidant effect is known to prevent free iron damage. Maybe the combined chelation and antioxidant effects of raw, fresh vegan diets explains why some individuals have reported miracle cures of MS after following these diets....perhaps they've gradually got rid of their free iron deposits!
With regard to green tea, I think it's unwise to skip the caffeine unless you just can't stomach the tea, because the caffeine has also been found to be neuro-protective and may be working in combination with the EGCG.
In the meantime, (sorry for the repetition) if you have MS, Parkinsons or Alzheimers, never ever
eat fortified breakfast cereals or white rice (it's "enriched" with iron by law) and limit refined flour based products (also "enriched") like white bread and pasta. This is exactly the non-heme iron that I believe is destined for the iron deposits in your brain.
This means no more cornflakes, no more branflakes. If you still haven't read the Parkinson's disease study about this it's here
. I must have read it ten times...each time I read it I feel a shiver. It took 16 years to carry out and looked at the iron consumption of about 120,000 doctors, dentists and other health professionals.