So you'd like to know how much calcium you actually need in your daily diet? You may have heard of the Recommended Dietary Intake for Australians (RDI's) which are an indication of how much of certain nutrients you need per day. Specifically for calcium, how much you need depends on your age and gender:
Short-term food restrictions tend to be associated more with ileostomies than with colostomies. The foods that cause the most concern are those containing cellulose: the natural fibre, or skeleton, that holds fruits, vegetables, nuts, and grains together.
BCIR is not for people who have or need a colostomy, people with [active] Crohn's disease, mesenteric desmoids, obesity, advanced age, or poor motivation. When Crohn's disease only affects the colon, it may, in select cases, be appropriate to perform a BCIR as an alternative to a conventional ileostomy. If the small intestine is affected, however, it is not safe to have the BCIR (because the internal pouch is created out of the small intestine, which must be healthy).