1. A countervailing meta-analysis does not mean it's "debunked"

2. A theory being debunked does not mean it's "just a marketing gimmick"

3. The serotonin theory being debunked does not mean "chemical imbalance" is totally exonerated

Great article though, thank you for sharing. Here's the paper itself for anyone interested (AFAICT it is oddly not linked in the UCL article?): https://pubmed.ncbi.nlm.nih.gov/35854107/