Here is some more information on the connection to the myelin damage in MS and B12. The title says it all. "Vitamin B12, demyelination, remyelination and repair in multiple sclerosis."
Jenny, that was a very insightful post. So far, we have been able to trace all of the missing hormones and neurotransmitters found in these diseases back to Phenylalanine. We have also shown a lack of tyrosine, tryptophan and other essential and nonessential amino acids. If you are missing them, then perhaps your first impulse would be to just take them in supplement form. Where does phenylalanine come from though? Phenylalanine is found in HIGH PROTEIN foods. Foods like eggs, meat, fish and dairy. These are also the same foods that contain B12. Is this just a coincidence? Is there evidence that in autoimmune disease and associated diseases that we are unable to break these proteins down? Just the fact that we lack B12, phenylalanine, and the hormones and neurotransmitters that are directly derived from them is evidence. Jenny has provided additional evidence. Here is a study that shows the inability to "metabolize" phenylalanine and tyrosine are connected to Collagen diseases. (Sorry, I couldn't access the full study) I will also find and post one on tryptophan. The NETs found in Lupus are also futher evidence. These NETs are comprised of DNA and protein fragments. We will be providing additional evidence as we move forward.
http://archderm.ama-assn.org/cgi/content/summary/77/3/255
So, if you are are unable to digest proteins, taking the amino acids of which the proteins are comprised may actually lead to an increased risk of disease.
Restoring your body's ability to digest proteins would allow you to release these essential amino acids and B12. This would in turn alleviate many of the symptoms that arise because of their absence.