A 2003 study by the Health Sciences Department of the University of South Australia suggests that taking concentrated bovine colostrum supplements could reduce the incidence of upper respiratory tract infections.

The study involved subjects being randomly allocated to consume 60g/day of Colostrum for eight weeks, then examining their occurrence of symptoms. Results from the first week were kept separate from those from the last seven weeks.

The results showed that during the first week of supplementation, there was no measurable difference in symptoms in the proportion of subjects taking the supplement as opposed to those who didn't. During the subsequent seven weeks, however, a much lower percentage of the subjects taking Colostrum reported upper respiratory infection related symptoms.

Symptom duration, however, did not differ. This suggests that the immune benefits achieved by Colostrum can be very good in terms of being a preventative, but that it does not have any measurable effect on an infection once it has already taken hold. That is why it is important to use Colostrum properly, as a preventative, and not depend on it to cure illness.

These overall results of this research study show that while Concentrated Bovine Colostrum doesn't take effect immediately, it does have definite immune enhancing and infection preventing effects when taken consistently, over an extended period of time.