Just thought I'd mention this for fellow sufferers with impaired senses of smell & taste/flavour (sweet, sour, salty, bitter & umami/savoury are classed as tastes, flavour is combinations of tastes apparently).
There is also such a thing as "smell training". 
Mine has been impaired since taking a single dementia pill, that was supposed to help my FM symptoms. I am no longer able to taste salt as well, which is a problem as I react badly to it, & worse still, I no longer enjoy the taste of red wine! >
What was in that pill?
At one point I didn't realise that someone had left a cupful of salt where the sugar was at work - it took quite a few sips of coffee to realise that something wasn't right. But it's not knowing the gas was still on that scares me
Apparently loss of smell can be low zinc also B12. J 
Memantine. It was a replacement medication for an anti-depressant which was supposed to reduce FM symtoms that I took for a week, & left me terrified to go to sleep for 3 months afterwards because of nightmares. I'm never taking any drugs like that again! I feel sorry for people with dementia who don't have a choice in what they take.
Who puts salt in a cup?!? I've not got as bad as mistaking sugar & salt, & can detect a sweetness in himalayan salt rather than the saltiness. I previously hated the stuff as it makes my fingers puffy.
I take zinc & have increased my B12 with sublingual, so my issue is solely a medical side effect. I miss enjoying a nice glass of red, but can still taste beer the same.
eek - just looked it up & side effects include swelling of hands & feet, others are worse.
I smell of onions!!!!
Does anyone have loss of sense of smell / taste? Any improvement when better medicated?
Sense of smell and taste
Loss of smell/taste -symptom of hypothyroidism?
Getting the smell of petrol Everytime I breath
