Robuta

https://pubmed.ncbi.nlm.nih.gov/24849699/
These results suggest an association between zinc deficiency and recurrent aphthous stomatitis.
recurrent aphthous stomatitiszinc deficiencypatientspilot
https://www.oulu.fi/en/theses/etiology-and-outcome-pfapa-periodic-fever-aphthous-stomatitis-pharyngitis-and-adenitis-syndrome
periodic feveraphthous stomatitisetiologyoutcomepfapa