This article from SciAm is an interesting read.

The team discovered that those who took SSRIs reported an increased sensitivity to sweet and bitter tastes, detecting them at concentrations of 27 percent and 53 percent lower, respectively, than before ingestion of the drug.

[…]

The team, however, did find that a decreased sensitivity to salt correlated well with higher general anxiety levels among the 20 study participants–as did sensitivity to bitterness–although no one in the study suffered from either anxiety disorders or depression.

“What we’re working towards, hopefully, is to try and use taste tests and taste reactions in people as a sort of marker for the levels of those neurotransmitters in people with depression, so that we can tell if they’ve got a serotonin problem or a noradrenaline problem or both,” Donaldson says.

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