Supplements›Immunity

Colostrum supplements: who they help and how to choose one

Colostrum may help people with a weak gut lining who get frequent diarrhea or gut trouble, or who catch colds often. Take 1–2 capsules of pure colostrum a day, and when you buy, always check whether it's "100% colostrum" and what percent immunoglobulin (IgG) it contains. Protein powders with just a little colostrum mixed in are Not recommended.

Who it’s for

People with frequent diarrhea or gut trouble, people who often catch colds or stomach bugs, older adults with low energy

Daily dose

1–2 pure colostrum capsules a day (about 200 mg immunoglobulin)

When

1–2 times a day; fine to take with probiotics

Best form

100% colostrum with IgG (immunoglobulin) content listed

What is colostrum?

Colostrum is the milk a cow produces in the first few days after giving birth. It contains far more protective compounds than regular milk, meant to protect the newborn calf.

It has three main components:

  • Immunoglobulins (IgG): Antibody proteins that latch onto harmful germs
  • Lactoferrin: A protein that keeps harmful germs from growing
  • Growth factors: Signaling compounds that help damaged tissue heal

That's why it has long been used for immunity, healing and gut lining support.

Colostrum benefits: where it may help

  • Strengthening the gut lining: It helps strengthen the inner wall of the gut (the lining). A healthier lining also means better nutrient absorption.
  • Diarrhea and a sensitive gut: Popular with people who have frequent diarrhea, a sensitive gut, or alcohol-related diarrhea that alternates with constipation.
  • Stomach lining: Its growth factors are known to help a damaged stomach lining heal.
  • Gut bacteria balance: Compounds like lactoferrin hold back harmful bacteria and feed beneficial ones.
  • Immunity: Used by people who catch colds often or have sensitive immune systems (like with allergic rhinitis), and by older adults with low energy.
There's a counterpoint. Immunoglobulins and growth factors are proteins, so they get digested in the stomach and gut. Ads claiming they're "absorbed intact and work throughout your whole body" are exaggerated. Expect a role inside the gut and not much more.

Who needs it / who can skip it

It may help if you

  • Have had frequent diarrhea or inflammatory gut trouble
  • Often catch colds or stomach bugs
  • Have gut problems from drinking, with diarrhea alternating with constipation
  • Are an older adult and other supplements haven't helped

Lower priority if you

  • Have no specific gut problem and just want one more thing for "gut health" — probiotics or fiber come first.
  • Want to give it to a child to help them grow taller — ads claiming it directly boosts growth are exaggerated. On the other hand, it doesn't contain enough to worry about early puberty either.

How to take colostrum and dosage

GoalDaily amount
General health1–2 pure colostrum capsules (about 200 mg immunoglobulin)
When your gut or overall health has really crashed (short term)10 g of colostrum powder, up to 20 g
  • It's good to take with probiotics. It's especially popular paired with bifidobacteria strains for gut recovery.
  • Taken with glutamine, it makes a gut-lining recovery combo.
  • If you work out, it's much more economical to buy whey protein and colostrum separately and mix them instead of pricey "colostrum protein."

How to choose a colostrum product: check just these

Many products are colostrum in name only, with barely any actually inside.

  1. Is it 100% colostrum? — Some "colostrum protein" products are whey protein with only 2–3% colostrum mixed in. A 200 g tub may contain only 800 mg of immunoglobulin, which works out to about 40 mg per scoop — less than a single capsule.
  2. Is the immunoglobulin (IgG) content listed? — Choose a product with a stated amount, like "IgG 20%."
  3. Check what the numbers are based on — See whether a number is per serving or for the whole container. Many products show a big number for the whole container.
Products with very little colostrum and a high price are common. Always do the math on the label numbers yourself.

Colostrum side effects and cautions

  • It comes from milk, so if you have a milk allergy, avoid it.
  • If milk upsets your stomach (lactose intolerance), start with a small amount.
  • For children, don't give the adult dose — follow the product directions.

Combinations

Works well with: Probiotics, L-Glutamine, Protein powder, Lactoferrin

Frequently asked questions

Do colostrum supplements work?

They may help support the gut lining and with diarrhea and gut trouble. But because the compounds get digested, ads claiming a big boost to whole-body immunity are exaggerated.

What's the difference between colostrum protein and a colostrum supplement?

Many colostrum protein products are whey protein with only 2–3% colostrum mixed in. If you want colostrum's benefits, choose a 100% colostrum product.

Does colostrum help kids grow taller?

Ads claiming it directly boosts growth are exaggerated. Think of it as an indirect help at most — a stronger gut that absorbs nutrients better.

Can colostrum cause early puberty?

The amount of growth factors in these products is not enough to worry about early puberty.

How much colostrum should I take a day?

For general health, 1–2 pure colostrum capsules (about 200 mg immunoglobulin) is enough.

Can I take colostrum with probiotics?

Yes, it's a good combination. Colostrum strengthens the gut lining while probiotics take care of your gut bacteria.

Related concerns

Gut healthWeak immune systemIndigestion & heartburn

Last updated 2026-10-12