I have added an “HSCT” tag at the foot of your post above. Selecting this tag will locate previous conversations on this topic. You might also want to read the following, from a BBC correspondent, who went to Mexico for this procedure:
As far as diets are concerned, it’s “horses for courses”. What works for one, will not work for another. So. it’s trial and error.
There’s only anecdotal evidence that it has a positive effect on MS progression. As a healthier diet, it can give you the “feel good factor”, which can only better your entire wellbeing.