I had Raynaud's for years and if hands got cold, the fingers got white.A few months ago, I started on the Rath-Pauling protocol of Vitamin C (ascorbic acid), Lysine, and Proline. I also added taurine and chelated magnesium (with glycine) plus MSM. This stack to deal with atherosclerosis, calcification and joint health.
I take this stack 3 to 4 times per day and it seems to be working. Recently, while defrosting the freezer, my wife and I noticed that despite handling the ice and melted ice water, my fingers did not turn white. No Raynaud's. A definite improvement.
This would indicate to me that at least one possible cause of the Raynaud's is calcification. The Rath-Pauling protocol is for calcification and plaque.
I am also careful to drink no fluoridated water, eat no dairy to avoid the calcium, take no calcium supplements, and take Borax for the boron.
The magnesium and other supplements has also been great for my 73 year old joints, not sore joints, no arthritis.
Just the atherosclerosis which I am working on.