Likutei Sichos – Vol 23 p 33 ff The answer to the question on the Rambam’s diet. The Tumim: it is all ruach hakodesh. Page 39-40.

Likutei Sichos – Vol 23 p 33 ff The question still remains, how is the diet and medicines (that are not limited to any constraints of time within Torah) have these limitations? Page 37.

Likutei Sichos – Vol 23 p 33 ff Attempted answer, the opportunity to keep the diet and remedies has expired. Like our inability to erase Amalaik, because they no longer exist and yet it is one of the 613 Mitzvos. This class discusses the rules that govern how we determine what are the 613 Mitzvos…

Likutei Sichos – Vol 23 p 33 ff The question the Gemara’s remedies and the RaMbaM’s diet are Torah, as they are recorded in their Torah works. Yet the Acharonim say that they are not applicable any longer. How can this be resolved? Page 34-7.