Metabolite profiling of saliva for the discrimination of Behcet's disease, Sjögren's syndrome, and recurrent aphthous stomatitis

Study identified 42 salivary metabolites using GC/MS that can distinguish between three conditions with overlapping oral symptoms (BD, PSS, RAS). Clear discrimination demonstrated via PCA and HCA analysis. Specific metabolites (malonic acid, aspartic acid) showed significant elevation in BD, indicating diagnostic potential.

Study does not prove clinical diagnostic utility yet—sample size is small (n=43 total); validation in larger, independent cohorts required before clinical implementation. Does not establish whether this approach outperforms existing diagnostic methods or whether metabolite testing will be practical/cost-effective in clinical settings.