Would like to find out the best vitamins for a man who has crohns.

Depends... Diet for crohn's largely depends on what part of the gut is affected, how active the disease may be, ; has the gut been surgically altered (e.g. "short gut"). When actively inflamed, many patients experience problems with lactose, gut stimulants (like caffeine), ; a lot of dietary fats or fiber. Consideration should be given to appropriate vitamin ; mineral supplements, esp. If ileum is involved.