Bovine colostrum is the first milk produced by cows in the 24-48 hours after birth — packed with immunoglobulins (IgG, IgA, IgM), lactoferrin, growth factors (IGF-1, TGF-β), and PRPs (proline-rich polypeptides). It went from obscure bodybuilding supplement to mainstream after Andrew Huberman's endorsement and ARMRA's DTC marketing. Our research shows genuine evidence for: gut barrier protection (reduced exercise-induced gut permeability by 80%), upper respiratory infection prevention (reduced URTI incidence by 50%), and immune support. The IGF-1 content is the primary concern — it's present in biologically significant amounts and may matter for individuals with cancer risk factors.
Colostrum provides a "comprehensive immune package": (1) IgG binds and neutralizes gut pathogens, preventing attachment to intestinal epithelium; (2) lactoferrin chelates iron from bacteria (bacteriostatic), disrupts bacterial membranes (bactericidal), and has antifungal/antiviral activity; (3) growth factors (TGF-β, IGF-1, EGF) stimulate intestinal epithelial cell proliferation and tight junction formation — physically repairing the gut barrier; (4) PRPs modulate immune response (increase underactive immunity, calm overactive immunity); (5) oligosaccharides act as prebiotics, feeding beneficial Bifidobacteria. The gut barrier repair mechanism is particularly relevant for athletes (exercise opens tight junctions) and NSAID users (NSAIDs damage gut lining).
No critical interactions identified.
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.