even though the small intestine eventually adapts to the loss of the large intestine it is possible to have a nutrient deficiency or become dehydrated. it's a good idea to take a multivitamin drink adequate fluids and get blood work done per your gastro-intestinal (gi) doctor's recommendation. common nutrient (vitamin and minerals) deficiencies they would check for through blood tests include iron (anemia) b vitamins like b12 and vitamin d. be sure to check with your doctor on the type of tests you need.
if you have had most of large intestine removed could you develop a vitamin definciency? how would that be detected?