I might be wrong, but I don't think it could be harmful. After all, you are only circulating fluid that is already there in your body. It isn't really additional fluid.
Hi-I have been reading all the posts for a few days-and I have a question...Can saliva production be too high? Like,if my husband ,Jack, sucks on hard candy all day-will he produce so much saliva that it could be harmful? (too much fluid)