The science says…

Eat shit.

After they gave birth, the researchers mixed 3.5 or 7 milligrams of their diluted fecal matter into 5 milliliters of breast milk—donated from a breast milk bank and pumped from the mothers themselves—and then fed it to their babies.

https://www.sciencemag.org/news/2020/10/eating-tiny-bit-mom-s-poop-could-give-c-section-babies-immune-primer