The detail most people miss
When people compare colostrum products, they usually focus on:
- Brand
- Price
- IgG percentage
But one of the most important factors is often overlooked:
When the colostrum was collected
What “first milking” actually means
First-milking colostrum is collected:
- Immediately after birth
- During the first lactation cycle
This is when colostrum is at its most concentrated.
It contains:
- The highest levels of immunoglobulins
- Peak concentrations of bioactive peptides (PRPs)
- Maximum growth factors
What happens after that
Colostrum changes quickly.
As time passes:
- IgG levels decline
- PRPs drop significantly
- Overall bioactivity decreases
Research shows that:
- PRP levels can drop by up to 75% after the first milking
- IgG concentration continues to decrease with each subsequent collection
By day 3 or 4, the composition begins to resemble regular milk more than true colostrum.
Why this matters for effectiveness
The benefits associated with colostrum, like immune and gut support, are tied to:
- Immunoglobulins
- Growth factors
- Signaling peptides
When these decrease, the functional value of the product changes.
The industry reality
Not all products specify their sourcing.
Some may:
- Use later milkings
- Blend multiple batches
- Prioritize volume over bioactive content
This isn’t always obvious from labeling.
| Feature | First Milking | Later Milkings |
|---|---|---|
| IgG levels | Highest | Declining |
| PRPs | Highest | Significant drop |
| Growth factors | Peak | Reduced |
| Overall potency | Maximum | Lower |
How to identify higher-quality colostrum
Look for:
- “First milking” clearly stated
- Whole (unfractionated) composition
- Minimal processing
These help preserve:
- Natural ratios
- Bioactive compounds
- Absorption characteristics
Why this isn’t just a marketing detail
This isn’t a small distinction, it’s foundational.
Two products labeled “colostrum” can differ significantly depending on:
- Timing of collection
- Processing methods
That affects:
- Composition
- Consistency
- Potential outcomes
The Udder Truth
If you’re evaluating colostrum quality, start here:
Was it collected during the first milking?
Because that’s when colostrum contains the full spectrum of compounds that make it unique.