Probiotics have become one of the most talked-about complementary approaches in psychiatry, thanks to a growing understanding of the gut-brain axis. 

L-theanine is an amino acid found almost exclusively in tea leaves. 

Exercise treats a broad range of psychiatric disorders, with support from large-scale meta-analyses encompassing hundreds of RCTs and tens of thousands of participants. 

Breathwork—the deliberate manipulation of breathing patterns—has roots in ancient practices like yogic pranayama.

The serotonin theory of depression is often dismissed as a myth, but it finds some grounding in 5-hydroxytryptophan (5-HTP).