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Colostrum

Supplement dairy derivative immunegut
Aka: bovine colostrum, IgG colostrum
Brands seen in Singapore: California Gold Nutrition, Mt. Capra, Nutricost, NOW Foods, Symbiotics
Not medical advice. Check with your doctor or pharmacist before you start, stop or change the timing of anything you take.
How to use
What it’s for
Gut permeability in athletes · immune markers barely move
When to take
No timing rule given
Pros & cons
Pros
  • Review: reversed exercise-raised gut permeability
  • Review notes fewer upper-airway illnesses in sportsmen
  • Not on the HSA prohibited or restricted lists
Cons
  • 10-trial meta-analysis: little change in IgA and IgG
  • Child data conflict; little evidence in older adults
  • Milk-derived — a dairy product by definition
Sources
  1. Bovine Colostrum Applications in Sick and Healthy People: A Systematic Review (Nutrients, 2021) — abstract via Europe PMC REST, PMC8308243 · read 2026-08-27
    what it says
    “Its use as food supplement showed interesting effects preventing upper respiratory illness in sportsmen … Conflicting results were provided in pediatric population and little evidence is available on its use with older adults”
  2. Bovine Colostrum Applications in Sick and Healthy People: A Systematic Review (Nutrients, 2021) — abstract via Europe PMC REST, PMC8308243 — opening definition · read 2026-08-27
    what it says
    “Colostrum is the first secretion of mammalian glands during the early period after birth giving. Its components are biologically active … Bovine colostrum has the highest concentration of these substances”
  3. Immunological Outcomes of Bovine Colostrum Supplementation in Trained and Physically Active People: A Systematic Review and Meta-Analysis (Nutrients, 2020) — abstract via Europe PMC REST, PMC7231218 · read 2026-08-27
    what it says
    “BC supplementation has no or a fairly low impact on improving the concentration of serum immunoglobulins (IgA, IgG), lymphocytes and neutrophils, and saliva immunoglobulin (IgA) in athletes … there is no consensus on the supplementation strategy”
  4. A Systematic Review of the Influence of Bovine Colostrum Supplementation on Leaky Gut Syndrome in Athletes: Diagnostic Biomarkers and Future Directions (Nutrients, 2022) — abstract via Europe PMC REST, PMC9227274 · read 2026-08-27
    what it says
    “Nine studies were selected … vigorous exercise profoundly increases intestinal permeability, and BC supplementation helps to reverse gut permeability in athletes … well-designed, placebo-controlled, and randomized studies are needed”
  5. HSA Singapore — Health Supplements Guidelines GL-CHPB-3-001 Rev. No. 020 (January 2026), clause 4.8 (Tables 4–5 list vitamins and minerals only; no colostrum row) · read 2026-08-27
    what it says
    “HS for use by the general adult population should not contain vitamins and minerals exceeding the stipulated limits stated in Tables 4 and 5”
  6. HSA Singapore — Guidelines on Prohibited and Restricted Ingredients in HS and TM, GL-CHPB-1-012 Rev. 001 (October 2025), clause 1.3; Annexes A and B checked · read 2026-08-27
    what it says
    “highlight the substances of concern when used in HS and TM and is not meant to be an exhaustive list [colostrum, bovine-derived ingredients, milk and immunoglobulin are not listed in Annex A or B]”
  7. iHerb Singapore — “Colostrum: Bovine Grass-Fed Powder & IgG Capsules” category page, default order, 77 results · read 2026-08-27
    what it says
    “California Gold Nutrition, Colostrum … Mt. Capra, Goat Colostrum … Nutricost, Colostrum … NOW Foods, Colostrum … Symbiotics, Colostrum Plus®”
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Updated 2026-08-29. Every line above traces to a numbered source. Kozen-X is not a medical device and does not give medical advice. It lists what published sources have written down — nothing more. A pair not listed is unrecorded, not cleared. Before you start, stop or re-time anything, talk to your doctor or pharmacist.