Patience, grasshopper. Sorry your mom's having trouble, but I'm glad she's started the program. Here's what the main Medifast site says:
During the first week or so on the program, some people experience diarrhea from the body's adjustment to the concentration of nutrients in the supplements. This will usually subside after a few days. Using too much sugar-free gum or mints can also cause diarrhea.
So I'd say if she's having gum or mints, stop or cut back. She might want to cut back on the fiber, too, for a while. Otherwise, I'd just give it a few days to see if it resolves itself.
Robin
203/130/130
Reached goal in August 2006
Added BodyBugg in May 2009
New ticker: 136.6/123.2/130