The Colostrum Buyer's Guide
You don't need to be an expert to buy good colostrum — you just need to check five things. Here's the full breakdown.
1. Guaranteed IgG percentage
IgG (immunoglobulin G) is the headline active compound. Quality brands publish a guaranteed minimum, commonly 20–40%. If a product hides its IgG number, treat it as a red flag — it usually means there isn't much to brag about.
2. Sourcing
Favor colostrum from cows raised without routine antibiotics or added hormones (rBGH-free), ideally grass-fed, and collected after the calf has fed. "First-milking" colostrum is considered the most potent.
3. Processing temperature
The antibodies and growth factors in colostrum are heat-sensitive. Low-temperature drying preserves more of them, which is why quality brands highlight low-heat or flash processing.
4. Third-party testing
Independent lab testing for potency and contaminants (heavy metals, microbes) is a strong sign of a serious brand. Look for it on the label or the brand's site.
5. Cost per gram — and the filler trap
Don't compare sticker prices; compare cost per gram of actual colostrum. Watch for products padded with sweeteners, gums, and flow agents that dilute the colostrum and inflate the "serving." A clean label with colostrum as the dominant ingredient is what you want.
| Check | Good sign | Red flag |
|---|---|---|
| IgG % | Stated, 20–40%+ | Not listed |
| Sourcing | Grass-fed, rBGH-free | Vague / unstated |
| Processing | Low-heat noted | No info |
| Testing | Third-party tested | None mentioned |
| Label | Colostrum-dominant | Lots of fillers |
BIOMIXA Bluegrass Colostrum
A grass-fed, unflavored colostrum powder that balances quality and price well — our top value-for-money pick. Confirm the current price and reviews before buying.