I'm not on IP, but I have used clear broths and bouillon and other super low calorie soups as an appetite suppressant for many years, and they actually worked fairly well (not so much for "real" hunger, but for the urge to snack), but it's very hard to find a broth powder that isn't too salty (and sadly the Better than Bouillon is still WAY too salty for me).
I first bought an assortment package of the Better Than Bouillon several years ago from QVC because of the spokespersons claim that it contained far less salt/sodium than other brands, and I ended up very disappointed because they didn't seem much, if any less salty than the brand I'd been using. The taste (except for the excess salt) was good, but like almost all bouillons I had to use a lot more water, and by the time they were diluted to a saltiness I could stand, the broth flavor was too weak to be enjoyable.
While the brand may be lower than most commercial bouillon, it's not nearly by as much as the spokesperson on QVC implied. And now that the product is on grocery store shelves, and lower sodium products are more available, it's often not the lowest sodium bouillon or soup base paste or powder on the shelf.
Even Better than Bouillon's reduced sodium varieties still contains 500g per serving (1/4 of the RDA), and their regular products contain almost 700g.
I did find salt and carb free broth powders from Spices, Etc. in both beef and chicken. (I also ordered mushroom and wine powders from this company, and they're also excellent - but the carb content would be far higher).
http://www.spicesetc.com/product/Mea...lty-Seasonings
http://www.spicesetc.com/product/Mea...lty-Seasonings
The broth powders can't be used alone, because they are super bland until you add salt and other seasonings, but it's possible to make a carb-free broth that only has the salt you choose to put in it. It is hard to get the flavor up without any salt, but I used it in combination with Better Than Bouillon or a regular bouillon so that I can use much less of the bouillon (and therefore end up with a much less salty, but still meaty flavored cup of broth).