tuneTypical Dose
Trials vary widely from sub-gram capsules to multi-gram powder protocols
Animal Derived
Bovine Colostrum
Bovine colostrum
Evidence TierCWADA NOT PROHIBITED
watchEffect Window
URI-related effects are usually observed over weeks to months.
check_circleCompliance
WADA NOT PROHIBITED
Overview
Clinical Summary
Bovine colostrum has its clearest evidence for reducing upper-respiratory symptoms in physically stressed groups, with much weaker support for broad immunity or gut-healing claims.
Bovine colostrum is marketed for immunity, gut repair, and athletic recovery. The best human evidence is for a lower burden of self-reported upper-respiratory symptoms during training or in higher-exposure groups. That is a narrower and less dramatic use case than the way colostrum is usually sold.
Colostrum contains immunoglobulins and growth factors, but the clearest human outcome signal is modest reduction in upper-respiratory illness burden rather than broad immune optimization.
Outcomes
What This Is Expected To Influence
Primary Outcomes
- Reduced upper-respiratory symptom burden in some stressed populations
Secondary Outcomes
- Weak support for broad gut or recovery claims
Safety
Contraindications and Interactions
Contraindications
- Dairy allergy
Side effects
- GI upset
Interactions
No entries provided
Avoid if
- You have significant dairy sensitivity or milk-protein allergy
Evidence
Study-level References
col-SRC-001Systematic review and meta-analysis
Sourceopen_in_newJones AW, et al. Bovine colostrum supplementation and upper respiratory symptoms during exercise training: a systematic review and meta-analysis of randomised controlled trials. BMC Sports Sci Med Rehabil. 2016. doi:10.1186/s13102-016-0050-7. PMID:27462401.
Population: Exercising adults from randomized bovine-colostrum trials.
Dose protocol: Trial specific across exercise-training studies
Key findings: Lower upper-respiratory symptom burden during exercise training.
Notes: Best broad review.
Paper content
This review is the main evidence anchor for bovine colostrum. It supports a modest reduction in upper-respiratory symptom burden during training.
col-SRC-002Randomized controlled trial
Sourceopen_in_newKaczmarek A, et al. Moderate Dose Bovine Colostrum Supplementation in Prevention of Upper Respiratory Tract Infections in Medical University Students: A Randomized, Triple Blind, Placebo-Controlled Trial. Nutrients. 2023. doi:10.3390/nu15081925. PMID:37111143.
Population: Healthy medical university students under high infection exposure.
Dose protocol: Moderate-dose daily supplementation in medical students
Key findings: Fewer and shorter upper-respiratory infections than placebo.
Notes: Useful modern supportive RCT.
Paper content
This trial extends bovine-colostrum evidence beyond athletes and supports a modest reduction in upper-respiratory illness burden.
col-SRC-003Randomized, double-blind, controlled trial.
Sourceopen_in_newMizelman E, Shaw KA, Kaviani M, Brenna E, Haines D, Chilibeck PD. Bovine colostrum supplementation in rugby. Eur J Appl Physiol. 2026;126(1):285-294. doi:10.1007/s00421-025-05900-4. PMID:40640599.
Population: Club-level rugby players during a competitive season.
Dose protocol: 38 g/day bovine colostrum for 8 weeks during competitive rugby season
Key findings: Improved vertical jump height but no effect on strength, aerobic capacity, body composition, or immune markers.
Notes: Small RCT showing a narrow neuromuscular benefit without broader performance or immune support.
Paper content
This double-blind RCT tested 8 weeks of bovine colostrum (38 g/day) versus soy protein in competitive rugby players. The colostrum group showed a significant improvement in vertical jump height compared to the control group. No meaningful differences were found for muscular strength, aerobic capacity, body composition, or salivary immune markers. The study suggests colostrum may have a modest neuromuscular performance benefit in team-sport athletes, but the broader performance and immune claims were not supported. The sample was small and the study was conducted during a single competitive season.
col-SRC-004Systematic review.
Sourceopen_in_newOswal D, Angolkar M, Mahantashetti NS, Dhagavkar P, Haritay S, Godbole M. Effect of bovine colostrum supplementation on gut health of children: A systematic review. J Pediatr Gastroenterol Nutr. 2025;80(6):1018-1027. doi:10.1002/jpn3.70033. PMID:40150801.
Population: Pediatric populations across 8 included studies.
Dose protocol: Various colostrum protocols across pediatric studies
Key findings: Some individual studies showed reduced diarrheal infection, but overall gut health benefits remained inconclusive.
Notes: Useful reality check on pediatric gut-healing claims.
Paper content
This systematic review examined bovine colostrum supplementation for gut health in children across 8 studies. Some individual studies reported reduced duration and frequency of diarrheal infections, but the overall clinical benefit of colostrum for pediatric gut health remained inconclusive. The review highlights the heterogeneity in study designs, colostrum preparations, and endpoints. It is useful as a reality check on the gut-healing marketing claims for colostrum, showing that the evidence in children is mixed and insufficient for confident recommendations.
col-SRC-005Randomized double-blind placebo-controlled crossover study
Sourceopen_in_newDurkalec-Michalski K, Główka N, Podgórski T, Woźniewicz M, Nowaczyk PM. The effect of 12-week high-dose Colostrum Bovinum supplementation on immunological, hematological and biochemical markers in endurance athletes: a randomized crossover placebo-controlled study. Front Immunol. 2024;15:1425785. doi:10.3389/fimmu.2024.1425785. PMID:39497827.
Population: Endurance-trained men undergoing exercise testing.
Dose protocol: 25 g/day for 12 weeks in endurance-trained men
Key findings: Increased post-exercise salivary secretory IgA, but did not change circulating immunoglobulins or establish broad systemic immune effects.
Notes: Useful mechanistic nuance. Supports local mucosal immune support more than broad immune-boosting claims.
Paper content
In this randomized double-blind crossover trial, 28 endurance-trained men used 25 g/day bovine colostrum for 12 weeks. Colostrum raised post-exercise and short-recovery salivary secretory IgA, suggesting a localized mucosal immune response after strenuous exercise. The intervention did not change circulating immunoglobulins or most standard blood markers, which keeps the evidence focused on a narrow exercise-immune signal rather than broad systemic immune enhancement. No intervention-related toxicity signal was reported.