I lived on VHC during my Tx and for about a year post Tx. As I could eat more and more solid foods I would mix the VHC with equal parts whole milk and drink that with each meal since I hated eating because of the dry mouth and poor taste. The good news is that slowly and I mean slowly he will regain his saliva and his taste. It took me 16 months post Tx before I could say I really began to enjoy eating again so patience is demanded.

If you are going to continue to post and I hope you do, it's better if you modify your signature to include his "stats" so that when you post the responder knows better where you're coming from and you don't have to repeat yourself over and over.
See mine below as an example. To add to your signature go to the top of the screen and click on MY PROFILE. Then click on EDIT PROFILE and scroll down to the Signature Block and type away.

Most importantly tell him he needs to consume a minimum of 3000 cals a day and also drink plenty of liquids. Also tell him that what he's experiencing now is normal. This recovery just takes a great deal of time and the body needs all the hydration and fuel he can give it to heal itself.

David

Age 58 at Dx, HPV16+ SCC, Stage IV BOT+2 nodes, non smoker, casual drinker, exercise nut, Cisplatin x 3 & concurrent IMRT x 35,(70 Gy), no surgery, no Peg, Tx at Moffitt over Aug 06. Jun 07, back to riding my bike 100 miles a wk. Now doing 12 Spin classes and 60 outdoor miles per wk. Nov 13 completed Hilly Century ride for Cancer, 104 miles, 1st Place in my age group. Apr 2014 & 15, Spun for 9 straight hrs to raise $$ for YMCA's Livestrong Program. Certified Spin Instructor Jun 2014.