The study by Lin et al.  suggests that patients diagnosed with type 2 diabetes who complain of xerostomia are more likely to suffer a decrease in salivary flow. Hyposalivation at different levels was observed in 111 (92.5%) patients, ranging from mild reduction to asialia. Because of the wide variety of tests for measuring salivary flow, many studies have presented conflicting results. The methodological heterogeneity and the lack of studies comparing salivary flow and xerostomia among diabetic groups–insulin-dependent and non-insulin dependent individuals–reveal the need for further studies on this issue. The association between low saliva production and moderate to severe xerostomia observed in this study was not significant (p = 0.489), showing that xerostomia is not associated with hyposalivation only.