This appears to be the actual study. I never understand why people want to read newspaper articles about this stuff rather than just look at what they actually said.
https://www.nature.com/articles/s41380-022-01661-0
... What isn't clear to me is how they decided which people to include in the study group. The exclusion criteria is clear. But it seems to me that there are a bunch of people who get diagnosed with depression who simply report symptoms that sound like outward depression symptoms. That would explain why there would be a bunch of noise in the data about neurotransmitter levels... Someone explain to me why I'm off base here.