What foaming agent that is commonly found in tooth pastes as well as foods and other personal care products is associated with recurrent aphthous ulcers.
It is suggested that the denaturing effect of SODIUM LAURYL SULFATE on the oral mucin layer, with exposure of the underlying epithelium, induces an increased incidence of recurrent apthous ulcers.
Alli BY, Erinoso OA, Olawuyi AB. Effect of sodium lauryl sulfate on recurrent aphthous stomatitis: A systematic review. J Oral Pathol Med. 2019 May;48(5):358-364. doi: 10.1111/jop.12845. Epub 2019 Mar 27. PMID: 30839136.