Bosnjak Kuharic D, Kekin I, Hew J, et al. Cochrane Database Syst Rev. 2019 Nov 1;2019(11). doi: 10.1002/14651858.CD012236.pub2. (Systematic review)

Despite calls for earlier intervention to prevent the transition to full-blown psychosis, only omega-3 fatty acids show some promise for achieving this goal.

https://www.evidencealerts.com/Articles/AlertedArticle/89240