Q. Is there a segula on eating shmura the entire Pesach?
A. See above question. Moadim Uzemanim (3: 267) writes that even according to the Poskim that maintain there is a mitzva on eating matza the entire Pesach, there is no purpose on constantly eating matza. This being similar to not having to perform the mitzva of shechita perpetually. He adds that eating matza is different from the mitzvos of tzitzis and shiluach hakan, in which there are special segulos mentioned in the Torah for the ones that keep these mitzvos.
However, Piskei Teshuvos (475: 12: n. 66) questions the above, since there are important segulos mentioned in Zohar (Tetzaveh) in regards to eating matza, that is called Michla Demehemenusa, or the food that brings to emuna and belief in Hashem. It is also called the Food of Healing, see Rokeach (291).
Horav Shlomo Miller’s Shlit’a opinion is that one should place more emphasis and vehemence in the compliance of the mitzva itself, that in the segulos involved.
Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a