I haven't seen mention of "Fibersource HN" as a tube food. Is anyone else here using that? John's RO rx-d a whole bunch of it, but it seems to be lower calorie than some of the things I see mentioned here. It has 300cal per 250ml can and he can't very many down in a day b/c of nausea (sometimes worse, sometimes not so bad) even with the antinausea meds (Zofran, Reglan, Ativan). Is the high calorie Carnation useful in the tube, or only used for oral intake?