tube feeding formula have lots of vitamins and minerals especially protein and calories..my hubby taking isosource, 7 cans a day but i also add 2 cans a day of the carnation instant breakfast VHC 530 calories.. and he did gain weight while during chemo and rad 2 lbs a week so i decided to give 1 can of carnation VHC today... if you like you can try give that carnation instant breakfast VHC 530 is