Ingredient Guide

Bovine Colostrum: Reading the IgG Number

Bovine colostrum is the first milk a cow produces after calving, naturally rich in immunoglobulins and other proteins. When you compare products, the figure that makes them comparable is the standardized IgG — the amount of immunoglobulin G — alongside the total colostrum per serving.

  • Evidence-based
  • Structure/function only
  • No proprietary blends

What it is

Colostrum is the pre-milk produced right after birth, a natural source of immunoglobulins (especially IgG), lactoferrin and other bioactive proteins. Because it's a dairy product, it carries dairy proteins and the considerations that come with them, and it's usually taken as a daily powder or capsule. Quality varies with sourcing and processing, since colostrum is collected in a short window after birth.

How it works

Colostrum is studied for its protein and immunoglobulin content, including in sport and exercise and around the normal function of the gut barrier in healthy, active people. Most people use it simply as a daily protein supplement — a steady habit, the same way they'd take anything else — rather than something taken in response to feeling unwell.

Why the form & source matter

Two products can both say "colostrum" and contain very different amounts of the active fraction, so a stated IgG percentage is what lets you compare them. Look for both the colostrum milligrams and the IgG percentage per serving; without the IgG figure, "contains colostrum" tells you little about strength. Powder and capsules use the same source — powder suits larger servings, capsules suit convenience.

How Monthlees uses it

Monthlees states the full picture: 2,300 mg per scoop with 575 mg IgG (25%) on the powder, and 500 mg per capsule at 30% IgG. The total milligrams and the IgG percentage are both on the label, so you can see the strength rather than take it on trust, and choose the format that fits your routine.

Frequently asked questions

What is colostrum?

The first milk produced after birth, naturally rich in immunoglobulins and other bioactive proteins.

What does IgG standardization mean?

It's the stated percentage of immunoglobulin G, so you can see how much you're getting and compare products.

Powder or capsule?

Same source: powder allows larger servings, capsules are more convenient.

Who should avoid it?

Anyone with a milk or dairy allergy — colostrum is a dairy product.

Research & references

  1. Bovine Colostrum: Its Constituents and Uses — Nutrients (2021) (source)
    Colostrum composition: immunoglobulins (IgG), lactoferrin and bioactive proteins; uses.
  2. The Use of Bovine Colostrum in Sport and Exercise — Nutrients (2021) (source)
    Colostrum studied in sport/exercise including gut-barrier context in healthy active people (rewrite away from disease).

References are provided for general educational context. They do not imply that this product treats, cures, or prevents any disease.

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

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Pure Colostrum (Powder)

Pure Colostrum (Powder)

Foundational immune and gut support — from bioactive bovine colostrum.

Guest $38.45
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Pure Colostrum (Capsules)

Pure Colostrum (Capsules)

500 mg bovine colostrum (30% IgG) per capsule — immune and gut support in one daily cap.

Guest $35.17
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