List the substances that the colon absorbs:

- vitamins like B and K
- water
- ions like chloride and sodium

Is there anything that I am missing? I am sure these are right but are there more??

colon is large intestine. Water, electrolytes, vitamins. Bacteria abound in the colon, these bacteria also produce large amounts of vitamins. The most important of these is Vitamin K and Biotin (a B vitamin). When the vitamin intake in diet is low, this can be an important source of these vitamins