Colostrum contains over 90 immune factors, including the naturally occurring Immunoglobulins IgG, and IgA. Supplementation with Freeze Dried Bovine Colostrum may support healthy immune system.
Thrive Bovine Colostrum is sourced from USDA Grade A dairy cows raised in the United States. It is laboratory tested to ensure it is antibiotic and rBST-free.
 
Suggested Article for further reading:
https://pubmed.ncbi.nlm.nih.gov/23773360/