Some athletes can have high intakes of L-glutamine because of their high energy and
protein intakes and also because they consume protein supplements, protein hydrolysates,
and free amino acids. Prolonged exercise and periods of heavy training are associated with
a decrease in the plasma glutamine concentration and this has been suggested to be a
potential cause of the exercise-induced immune impairment and increased susceptibility to
infection in athletes. However, several recent glutamine feeding intervention studies indicate …