Effect of various types of milk on salivary pH among children: a pilot randomized controlled crossover trial

Objective This study aimed to evaluate salivary pH changes after consuming three types of milk in children aged 3–5 years. The null hypothesis was that no statistically significant difference would be noted in the salivary pH between high-protein, full-fat, and sweetened milk groups at different time points. Materials and methods This was a double-blind, pilot randomized controlled crossover trial. 30 Children have undergone three experimental sessions with a 1-week washout period. Each child was given 250 mL of one of the following types of milk: high-protein, full-fat, or sweetened milk. The salivary pH was measured at the baseline (t 0 ) after 5 (t 1 ), 10 (t 2 ), 15 (t 3 ), 30 (t 4 ), and 60 (t 5 ) minutes of milk consumption, using a pH saliva indicator strip. Results There is a sharp drop in salivary pH after 5 min of sweetened ( P