| Effect | Decrease |
| Trial Design | Non-controlled trial |
| Trial Length | 1-6 months |
| Number of Subjects | 174 |
| Sex | Male |
| Age Range | 18-29 |
| Body Types | Average |
Supplementation of 60g colostrum (control using whey protein) daily for eight weeks noted that, in the last seven weeks of the study (first week could potentially have prior infections confounding the results) that colostrum was associated with a 32% occurrence of symptoms of URTI while whey was associated with 48% occurrence; while a reduction in risk of symptoms was noted, the duration for when they occurred was not affected.
Subjects were mildly physically active, and the pool of participants in this study was not unique to this study but instead assessed data from participants in previous studies in which logbooks with sickness rates were collected.
