Sham treatment - yes, kind of.  It works for a little while for some people because it is a form of blood-letting that reduces accumulations of substances such as toxins in the blood.   People with certain metabolic genetic anomalies have problems eliminating toxins and even excesses of healthy minerals.

The majority of MS patients have a form of the disease that is treatable.   The treatment is inexpensive though and so doesn't get much support.     Of the 100,000 or so MS patients in Canada, fewer than 5% have a form of the disease that should require advanced medical treatments such as stem cell therapy.

Note that Canada has the highest rate of MS in the world.   Countries that receive less sunlight than the majority of Canadians such as Norway and Finland have much lower rates of MS.