Which is best after colectomy: ileostomy or j-pouch?

Depends: This is highly dependent on why this surgery is indicated. If the person is not too elderly or have other risk factors such as crohn's disease or extensive cancer, then a j-pouch may be appropriate. This is performed by a trained surgeon who has the proper knowledge. Some patients do not have a choice due to their disease condition and will need an ileostomy.

J pouch: Ileostomy means you have poop in a bag. J pouch allows you to poop in the bathroom.

Depends: Both have their pros and cons. J pouch can at least let you not deal with ileostomy but the high volume bms may be too much to deal with. Being younger makes it easier to adjust to j pouch.