I was diagnosed with PD last Friday and I am still in denial. I have been a vegan for the last 4 years and now feel that lifestyle helped caused my PD because of a lack of B12. My main discomfort comes from getting cold hands when the weather drops to the 70s and I start to shiver and shake. and my body temp goes to 95. My thyroid checks out OK. Dr. has no answer to why it happens. Larry Arky