Evidence Level
Moderate
Bovine colostrum has a solid and growing evidence base for gut and immune health. March et al. (2019) showed dramatic reductions in exercise-induced intestinal permeability. A systematic review by Jones et al. (2015) confirmed immune benefits, particularly for reducing upper respiratory infections in active populations. Shing et al. (2009) demonstrated gut-protective effects in competitive cyclists during high-intensity training. The immunoglobulin content (primarily IgG) provides a unique mechanism not found in other supplements — direct antibody-mediated immune support in the gut lumen. Colostrum has seen a surge in consumer interest driven by ARMRA and social media, though the scientific interest predates the trend by decades.