Colostrum

Colostrum is a 6.5–7.0/10 fit for immune function, gut health, recovery repair, especially for readers who can match the protocol to dairy tolerance, immune stress, gut barrier context, and dose quality. The best evidence anchors are Yao et al. 2026, which 4 RCTs; 670 preterm infants; feeding intolerance signal but no firm recommendation and no significant NEC or full-enteral-feeding advantage, and Hajihashemi et al. 2024, which 10 RCT articles; significant reductions in lactulose/rhamnose and lactulose/mannitol permeability ratios; no I-FABP difference. Bovine colostrum is a dairy-derived immune and gut-barrier supplement with the best human evidence in athletes: Jones 2016 found 44% fewer upper respiratory symptom days, and Hajihashemi 2024 found reduced intestinal-permeability markers.

✅ Best for: Athletes under heavy training loads who repeatedly lose training continuity to upper respiratory symptoms, especially when 8-12 weeks of 20 g/day powder is realistic. Frequent travelers, parents of young children, healthcare workers, and indoor-exposure-heavy adults who want a seasonal immune tool and understand that the best evidence comes from athlete trials. Heavy NSAID users and people with gut-permeability-type symptoms may also be good fits, especially when bovine colostrum is stacked with L-glutamine, zinc carnosine, and diet cleanup. Choose IgG-standardized, true first-milking, low-heat powder from calf-first surplus sourcing.

❌ Avoid if: You have cow's milk allergy, prior dairy-triggered hives, swelling, breathing symptoms, or anaphylaxis. Avoid bovine colostrum if you need disease treatment for IBD, chronic diarrhea, immune deficiency, neonatal feeding intolerance, or retinopathy of prematurity without clinician supervision. Athletes subject to anti-doping rules should use third-party-tested products and remember WADA's IGF-1 caution. Skip bovine colostrum if your goal is direct performance enhancement, muscle growth, testosterone, skin anti-aging, cognition, or longevity. The evidence does not justify those claims, and 1-3 g/day influencer protocols are usually underdosed for the adult endpoints that matter.