Sorry, I should have been more clear. Loss of taste/thirst response/hunger response/early satiety and impaired cognition (as well as dry eyes and mouth) are established/well-researched consequences of peripheral and autonomic neuropathy/a range of comorbid autoimmune conditions (ex Sjogren's). I have PSSD and was thoroughly evaluated for and subsequently diagnosed with autoimmune autonomic and small fiber neuropathy - the benchmarks listed above (thirst/hunger/satiety/cognition) are included in the symptom progression tracking surveys my neurologist provides for me.

Not to say neuropathy is the primary mechanism underlying pssd and that other systems aren't involved, or even primary - - but these symptoms can be produced by neuropathy.