By Rob Diepersloot, Dairy Farmer and Founder of WonderCow
If you’ve been following along, you may have read my other post about grass-fed colostrum in the U.S. - and how it’s not realistic. That one is about supply chain reality and why the claim deserves extra questions. If you want to go deeper on that, you can read it here: Check Out Blog.
Today I want to talk about what I think matters even more for your results: Processing.
Because in the supplement world, a “grass-fed” sticker can look clean on the front of a jar, while the processing behind it quietly changes what ends up inside the jar.
1. Colostrum is not the same as other supplements.
Colostrum is a time-sensitive, bioactive first food designed to do a job. Whether it can still do that job depends on what happens after it leaves the cow. That’s why I always come back to one simple idea: Don’t just trust a label. Look into whether you can trust the source. Whether you trust the process.
2. What grass-fed really proves (and what it doesn’t)
Let me say this clearly. I’m not here to champion “grass-fed” systems as the only right way. I’m a dairy farmer, and I’ve learned there are a lot of ways to care for cows and land well, including sustainable and regenerative approaches. What I do want is honesty and proof behind the claims, and a focus on what actually impacts the quality of the powder.
But from a pure science standpoint, diet can change milk fat. Pasture-based feeding has been shown, in many studies, to shift the milk fat profile, including increases in omega-3 fatty acids like alpha-linolenic acid and increases in CLA (conjugated linoleic acid) compared to some total mixed ration systems.
That’s real. It’s documented. It’s also not magic. Milk composition is influenced by a lot more than one word on a label, including genetics, stage of lactation, forage quality, season, and overall ration design.
So yes, grass-fed can shift the fat profile. But here’s the colostrum supplement problem.
3. Most colostrum powders remove the fat
A lot of colostrum powders are not made from whole colostrum. They are made by skimming off the fat to create a bright white, uniform, long shelf life, and convenient powder.
And that one decision changes the product.
Because many of the “grass-fed differences” people are looking for are tied to the fat. If the fat is removed, those differences can be reduced or lost long before the powder ever hits your kitchen counter.
This is why I’m careful with front-label claims. You can start with great raw colostrum and still end up with a product that doesn’t reflect what people think they are buying.
Try Whole Colostrum
4. Fat in colostrum is not just calories.
It's part of the design - and full of nutritional value.
Here’s what most people miss. In colostrum, fat is not just extra calories (and it’s not many - relatively speaking). It’s part of the package.
Whole colostrum naturally contains fat-associated components like the milk fat globule membrane (MFGM) and phospholipids. These are not buzzwords. They are real structures in milk that carry functional compounds and play a role in how milk behaves.
And from a practical point of view, fat does three big things for a supplement like colostrum.
1. It helps your body absorb fat-soluble
2. It brings its own functional value through things like the milk fat globule membrane, also known as MFGM.
MFGM is a natural structure in colostrum that contains phospholipids and other compounds that support the gut lining, cell membranes, and has been studied for its role in early cognitive development in children.
3. Fat can help act like a natural buffer in digestion.
Colostrum’s key bioactives are delicate. The more you strip and manipulate the ingredient, the more you change how it holds up through the digestive process and how much of that full-spectrum effect makes it to the gut.
Keeping the fat in… also keeps the nutrients in.
5. Processing is where quality is preserved or destroyed
Colostrum contains a whole team of sensitive bioactives. IgG. Lactoferrin. PRPs. Enzymes. Growth factors. Peptides. These are not indestructible.
If a product gets hit with too much heat, harsh drying, or aggressive filtration, you can lose functional activity. And once proteins are denatured or certain fractions are removed, they don’t magically come back just because the label still says colostrum.
Here are the processing issues I pay attention to as a farmer and founder:
- Heat: Too much heat can damage fragile proteins.
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Over-filtration: Chasing a “clean” look can strip out parts of what makes colostrum unique.
- Defatting: Removing cream does not just change nutrition, it can change how the product performs as a whole.
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Gentle handling: Low-temp processing and minimal manipulation help preserve the full spectrum.
You can start with incredible raw colostrum and ruin it with one poor decision in the processing room.
Or you can handle it carefully and protect what nature designed. This is what we’re all about at WonderCow! It may take a lot of extra effort, cost, and attention, but quality nutrition for you is our top priority.
What We Do At WonderCow
At WonderCow, we keep things simple. We’re not chasing buzzwords. We’re chasing the truth of the ingredient.
That means we focus on the stuff that actually matters:
- Whole colostrum, not defatted
- Gentle processing with the goal of preserving bioactive activity
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Minimal manipulation so it stays closer to its natural state
Simple. Clean. Transparent. Potent.
Shop Colostrum
What To Ask Before You Buy
If you want a quick gut-check when you’re shopping, here are a few questions worth asking:
- Is it whole, or was the fat removed?
- How was it processed (heat, filtration, handling)?
- Do they measure and protect bioactive activity like IgG?
- Can they explain the process clearly without dodging?
A trustworthy brand will welcome these questions.
Bottom Line
When cows eat a lot of grass - or "high forage diets" - it's been shown to influence milk fat composition. But in colostrum powder, processing practices decide everything. If the fat gets removed and the bioactives get damaged or stripped down, the label can say a lot while the product delivers a lot less.
If you want colostrum that performs the way nature intended, focus on what actually predicts quality:
1. How it was collected.
2. Whether it’s whole.
3. How it was processed.
4. How much bioactive activity is preserved.
5. That’s where the gold is found.
With gratitude,
Rob Diepersloot
Founder, WonderCow Nutrition