Colostrum Supplements: Gut and Immune Benefits

1. What Is Colostrum?

Colostrum is the first milk produced by mammals after giving birth. Supplements use bovine (cow) colostrum, which is rich in antibodies (immunoglobulins), growth factors and proteins.

2. Evidence

3. Dosage and Safety

Studies often use 10 to 20 g per day. Colostrum is a dairy product, so avoid it with milk allergies. It's not well studied in pregnancy.

4. What's in Colostrum

Bovine colostrum contains immunoglobulins like IgG, growth factors such as IGF-1, lactoferrin, proteins and other bioactive compounds. These components support immune function and gut health in newborn calves, and researchers study whether they offer similar benefits to humans when taken as supplements. Supplement quality depends on collection timing and processing.

Look for products that list immunoglobulin content and are sourced from reputable dairy farms.

5. Colostrum for Athletes

Some studies suggest colostrum may reduce gut permeability during intense exercise in the heat and lower the incidence of upper respiratory infections in athletes. These benefits may be valuable during heavy training blocks. Results are promising but not consistent, and more research is needed.

6. Colostrum and Drug Testing

Colostrum contains small amounts of growth factors like IGF-1. While colostrum itself isn't prohibited by WADA at the time of writing, athletes should use third-party tested products and check current anti-doping guidance.

7. How to Take Colostrum

Colostrum is usually sold as powder or capsules. Mix powder into water, smoothies or shakes, or take capsules with water. Many people take it in the morning on an empty stomach, though evidence for timing is limited. Studies typically use 10 to 20 grams daily for several weeks.

Start with a smaller dose to check tolerance, as some people experience digestive changes.

8. Our Recommendation

Consider colostrum if you're an athlete under heavy training stress or frequently get sick during hard training blocks. Choose tested products from reputable sources.

9. Colostrum Side Effects

Colostrum is generally well tolerated, but some people experience digestive changes such as gas, bloating or loose stools, especially when starting. People with milk allergies should avoid colostrum. Because research in pregnancy is limited, pregnant and breastfeeding women should consult a doctor first.

Start with a smaller dose and increase gradually to reduce digestive effects.

10. Final Tip

Give colostrum at least four to eight weeks of consistent use before judging results, and track things like digestion and how often you get sick during heavy training periods.