A child experiencing chronic non-specific diarrhea without malabsorption may have an increased intake of which substance?

In the context of a child experiencing chronic non-specific diarrhea without malabsorption, an increased intake of sorbitol can lead to gastrointestinal disturbances. Sorbitol is a sugar alcohol that is poorly absorbed in the gastrointestinal tract. When consumed in large amounts, especially from sugar-free foods or certain fruits, sorbitol can attract water into the intestines due to its osmotic properties. This water retention can increase stool frequency and contribute to diarrhea.

Fructose, while it can also cause gastrointestinal issues in some individuals, particularly those with fructose malabsorption, is not as closely linked to osmotic diarrhea as sorbitol. Glucose and sucrose do not typically cause the same laxative effect as sorbitol when consumed in typical amounts. Therefore, the presence of chronic diarrhea in this scenario is particularly associated with excess sorbitol intake, making it the most relevant substance to consider.