There are virtually no syndromes and/or diseases that are not reversible. If she is interested in taking control of her own health [and I sincerely hope she is], the following will give her all the information she needs:
Any of the discourses by Luigi Cornaro (available free online);
Any of the books by Horace Fletcher (available free online);
Any of the writings of Arnold Ehret.
Just like virtually everything else in life, it is all ultimately up to YOU.
You have all my best wishes for a successful journey and resolution,