Not if you genocide it with antibiotics or your parents or environment didn't have it well in the first place. People may want to take a fecal sample before st

Not if you genocide it with antibiotics or your parents or environment didn't have it well in the first place. People may want to take a fecal sample before starting antibiotics to "reseed" themselves. Also, it will take time to map and analyze essential and harmful constituent species. Perhaps there will be the equivalent of "vitamin" essential bacterial for persons of particular genetic makeups and diets.