I've done a little digging since the possibility of have B-12 deficiency was presented. Another glove that fits.

Effect of L-dopa on plasma homocysteine in PD patients

Relationship to B-vitamin status

http://www.neurology.org/cgi/content/abstract/60/7/1125

Conclusion: L-Dopa can cause hyperhomocysteinemia in PD patients, the extent of which is influenced by B-vitamin status. The B-vitamin requirements necessary to maintain normal plasma homocysteine concentrations are higher in L-dopa-treated patients than in those not on L-dopa therapy. B-Vitamin supplements may be warranted for PD patients on L-dopa therapy.

Symptoms of pernicious anemia [vitamin B 12 deficiency]:

http://www.nlm.nih.gov/medlineplus/e...cle/000569.htm

another connection,
paula