Distribution of the - 13910C>T polymorphism in the general population of Portugal and in subjects with gastrointestinal complaints associated with milk consumption.

Background: The - 13910C>T polymorphism has been associated with lactase persistence (LP) in European populations.

Aim: To assess - 13910C>T genotypes across Portugal and in adult individuals with unspecific gastrointestinal complaints associated with milk consumption.

Subjects And Methods: This study genotyped - 13910C>T in the general population from Northern (n = 64), Central (n = 70) and Southern (n = 65) Portugal and in 40 subjects with gastrointestinal symptoms.