My hubby has been dealing with a nasty taste in his mouth (sometimes he calls it metallic), and I read somewhere online that the cause could be a build up of
ammonia. It ruins the taste of water & food, and often triggers nausea (especially upon rising from the bed).
Ammonia is a base substance (its Ph is really high), so I reasoned that acids might help. I tried several things (lemon, lime, tangerine), but what has worked best for him is dried cranberries! We can keep a container of 'em bedside and he can nibble on a few any time, and the nasty taste is neutralized. He says the cranberries actually taste sweet rather than tart. It has allowed him to enjoy meals and water again!
We shared this tip at the PD Clinic today and the nutritionist had no objections, so I'm passing it along here
.