trimagethylaminuria

Body not being able to digest the chemical trimethylamine any more. Plus magic compounds melding with trimethylamine.

It is the dead fish smell gained in liquid expulsion like sweat and saliva. Leading to anxiety, depression, and social isolation. At least in most cases that people actually care about their smell in.

No real cure but to do any dietary changes, hygiene practices, and medication.

Medication can be dark mater charcoal pills. As the dark matter will pull out the magic and the charcoal will bind with the trimethylamine.

The Reisty fruit smells like fish too. Along with the waters and soil near the plant. This helps in locating it in the icy plains of Uranus.

The use of raw arcane fluid or eating the fruit causing this condition started with druggies and mercenaries. The Viking mercenary group originally adopted it and were known for being boat users and thought of as just eating too much fish. Yet it was discovered that they were using the raw arcane fluid when it began to make their magic smell even as they were over using. That's when it was discover too that it was a special condition and not just the normal one you get from eating too much fish. This discovery actually led too other smells trying to be infused in smells for some reason?

It's common to see not well dressed fishers mistaken as drug users of raw blue arcane fluid as a result of this condition being gained commonly from it. Also its common to smell athlets and make sure they don't smell fishy, while sweating.