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IGF-I, IgA, And IgG Responses To Bovine Colostrum Supplementation During Training
| Effect | Increase |
| Trial Design | Double blind |
| Trial Length | 2-4 Weeks |
| Number of Subjects | 30 |
| Sex | Both Genders |
| Age Range | 18-29 |
| Body Types | Average |
Supplementation of 20g colostrum (4.8g immunoglobulins and 74mcg IGF-1) for two weeks in healthy adults is able to increase IGF-1 concentrations by 17%, but this does not appear to be related to oral consumption of IGF-1 in the product (as it is hydrolyzed).
Salivary, but not serum, IgA was increased 33% and IgG was not affected despite oral ingestion of 4.5g IgG (0.3g IgA).
