The researchers concluded: “Oral lichen planus causes serum vitamin B12 deficiency.
They attribute the association to restricted B12 intake hampering the “normal functioning of immune and neuropsychologic system”, which has a role to play in halting the development of oral lichen planus.
How to spot oral lichen planus
The Mayo Clinic explains: “Oral lichen planus may appear as white, lacy patches; red, swollen tissues; or open sores.”
According to the health body, the white, lacy patches may not cause discomfort when they appear on the inside of the cheeks.