I used to have a cup of bouillon a day when I was on Cambridge and it didn't seem to do any harm. There's a low salt version if I remember rightly which is probably better. I considered it to be like their savoury vegetable drink (only cheaper!).
I used to have a cup of that followed by a Cambridge mousse in the evening so it felt like 2 'courses'. Obviously, there isn't a mousse option on Exante but I suppose the same principle applies.
At the moment, as it's early days for me, I don't want to stray from the very narrow path but maybe later I may bend things a bit to make life a little easier.