LTF and oral lichen planus: Furthermore, the mean salivary lactoferrin flow rate of the healthy volunteers, OLP patients before topical 0.1% FAO treatment, and OLP patients after topical 0.1% FAO treatment was 1.11 ± 0.64, 1.13 ± 0.99, and 0.67 ± 0.28 ng/min, respectively.