Yes :) Cis-urocanic acid, a sunlight-induced immunosuppressive factor, activates immune suppression via the 5-HT2A receptor (2006) — https://doi.org/10.1073/pna

Yes :) Cis-urocanic acid, a sunlight-induced immunosuppressive factor, activates immune suppression via the 5-HT2A receptor (2006) — https://doi.org/10.1073/pnas.0603119103 https://doi.org/10.1073/pnas.0603119103 It’s super interesting to just stuff the names of the cytokines into Google Scholar and see what pops out. IL-6, IL-10, and TNF-alpha are some of the ones with a lot of papers out. There’s so much more knowledge out there than I could have imagined. It’s like almost nobody reads these papers. It’s wild.