Bovine Colostrum: Promising for Gut and Immunity, Not a Cure

Summary

Bovine colostrum has **genuine, modest, emerging** evidence for supporting the gut barrier and reducing respiratory-infection days in athletes — but the gut data are statistically shaky and the mechanism is unsettled, so it's a reasonable "watch this space" support, **not** the leaky-gut cure or must-have it's marketed as.