Colostrum is the first milk that mammals produce in the hours after birth – more concentrated than mature milk. It naturally contains immunoglobulins (mainly IgG), lactoferrin, growth factors, proteins, and carbohydrates. As a dietary supplement, it comes predominantly from bovine sources, sold as powder or capsules. No health claims are approved for colostrum.
Colostrum is the very first milk that mammals produce in the first hours after birth – a thick, yellowish-creamy "pre-milk" whose composition differs markedly from the mature milk that follows. As a dietary supplement, bovine colostrum (from the cow) is almost always used, gently dried into powder or capsules. What makes this brief milk phase so special, why is processing so decisive, and what does research actually investigate? Here you'll get a factual, honest answer – without any promises of effects.
The key points at a glance
- Colostrum is the first milk of the first hours after birth – more concentrated than mature milk.
- It naturally contains immunoglobulins (especially IgG), lactoferrin, growth factors, proteins and carbohydrates.
- As a supplement, colostrum is mostly available as powder or capsules from a bovine source.
- For colostrum, no health claims are authorised in the EU – we describe it purely factually.
- With a milk protein allergy, during pregnancy/breastfeeding or with immune conditions, please consult a doctor.
What exactly is colostrum?
The term comes from Latin and refers to the "pre-milk" or "beestings". Immediately after birth, the mother produces this special secretion for a short time before the body switches to mature milk. Within this narrow window, the composition is exceptionally dense: colostrum is naturally very rich in protein and contains a whole range of biologically active components that occur in mature milk only in smaller amounts. For newborns it is the very first food – nature deliberately packs a lot into it here.
For dietary supplements, bovine colostrum is almost always used – first milk from cows that is surplus to calf rearing. It is filtered, pasteurised and processed especially gently (often freeze- or spray-dried) to preserve the delicate protein structures as far as possible.
Which components are in it?
The composition is the actual reason why colostrum receives so much attention:
| Component | What it is |
|---|---|
| Immunoglobulins (especially IgG) | antibody proteins, often the largest share by quantity |
| Lactoferrin | an iron-binding protein (see separate guide) |
| Growth factors (e.g. IGF) | signalling proteins that naturally occur in the milk secretion |
| Cytokines & peptides | small protein building blocks with a signalling function |
| Oligosaccharides | special multiple sugars |
| Vitamins & minerals | present in a natural matrix |
The exact content varies depending on origin, milking time and processing. As a rough rule of thumb: the earlier after birth the milking takes place, the higher the proportion of immunoglobulins. "First-milking colostrum" is therefore a quality term you'll come across again and again in product descriptions – and reputable suppliers state a standardised IgG content.
What happens to colostrum in the digestive tract?
A legitimate question with all protein supplements is: do the delicate proteins even remain intact, or does the body simply digest them like any other food? This is exactly why gentle processing is so important – it is meant to preserve the protein structures as well as possible. How much of it survives the passage through the stomach and intestines, and in what form, is itself a subject of research; we'll place this honestly in context below. Regardless, one thing is clear: colostrum always provides high-quality, natural protein in a special matrix.
Why many people use colostrum
Colostrum is not a trend of recent years – beestings have long played a role in livestock farming and traditional nutrition, because newborns receive them as their first food. In the modern supplement world, those who reach for it today are above all people who value natural, minimally processed protein sources, who engage intensively with their immune metabolism and gut health, or who see colostrum as part of a protein-rich routine. It is also popular in the sports and recovery context. Important: this describes what people do – it is not a promise of effect.
What research is looking into
Bovine colostrum is a genuinely active field scientifically. Research is interested above all in the immunoglobulins and growth factors it contains and investigates how these proteins are processed in the digestive tract and whether parts of them survive with their structure intact. Questions being examined revolve around the intestinal barrier, recovery in sport, and the interplay of the milk proteins with the body's own immune metabolism. An honest note: much of this is still in its early stages, the body of evidence is heterogeneous, and for individual effects it isn't sufficient for firm statements. What is established above all is the basic nutrient and protein character. We deliberately depict this state of things honestly, rather than deriving promises from it.
Use, forms & quality
Colostrum typically comes in two forms:
- Powder: flexibly dosable, easily stirred into water, milk or shakes – a slightly milky taste.
- Capsules: practical for on the go and precisely portioned, but the single dose is limited.
When buying, it's worth looking at these quality features:
- First-milking colostrum: secretion from the first milkings after birth is the richest.
- Standardised IgG content: tells you about the concentration of immunoglobulins.
- Gentle drying: freeze-drying preserves delicate proteins better than strong heat.
- Lab testing & origin: traceable origin and tested purity are a must.
Dosage & timing
There is no universally "correct" dose – stick to the manufacturer's serving recommendation, since products differ greatly in immunoglobulin content. In practice, many people take colostrum in the morning on an empty stomach or with some time between it and a protein-rich meal. As a powder it can be stirred into cool water, milk, a shake or yoghurt – not into boiling-hot liquid, to protect the delicate proteins. Whether you use it in cycles or continuously is a personal decision; there is no proven advantage to one variant or the other.
Colostrum, lactoferrin & protein: placing it on the shelf
Colostrum is often mentioned in the same breath as other protein-focused supplements – which quickly leads to confusion. To distinguish them: lactoferrin is a single, iron-binding protein that also occurs naturally in colostrum, but is offered separately as a pure substance. Whey protein also comes from milk, but is an isolated protein concentrate for building muscle, without the special bioactive matrix of first milk. Colostrum sits in between: it is neither a pure protein source like whey nor an isolated single substance like lactoferrin, but a natural whole secretion with a special, multi-layered composition. Anyone standing at the shelf comparing options should be clear about these three categories – they answer different questions and are not interchangeable.
Who is colostrum not for?
Since it is a dairy product, colostrum is unsuitable for people with a milk protein allergy. Caution is also advised with lactose intolerance, although the lactose content varies depending on the preparation. During pregnancy and breastfeeding, with autoimmune or immune conditions, and when taking medication, you should consult a doctor beforehand. For vegans, colostrum is unsuitable anyway as an animal product.
Honestly placed in context: established vs. open
What is established is that colostrum is a natural, exceptionally composed first milk with a high protein content and a range of bioactive components. What is open and the subject of ongoing research is which of these components pass through digestion, in what form, and what concrete effects result from that. Anyone trying colostrum should see it for what it is – a high-quality natural supplement – not as a substitute for a balanced diet or medical care.
Matching products from Scheunengut
If the interplay of the body's own defences and nutrients interests you, you'll find a suitable selection in our Immune System category. For everything around digestion and the gut, it's worth a look at Gut & Digestion. Matching guides to read on: our lactoferrin guide, the overview nutrients for the immune system, immune system in winter, gut, microbiome & probiotics, recognising protein quality and nutrients for healthy mucous membranes.
Frequently asked questions (FAQ)
What is colostrum and what's in it?
Colostrum is the first milk (pre-milk/beestings) of the first hours after birth. It is more concentrated than mature milk and naturally contains immunoglobulins (especially IgG), lactoferrin, growth factors, peptides, oligosaccharides as well as vitamins and minerals. As a supplement, bovine colostrum from the cow is usually used.
What does first-milking colostrum mean?
It refers to colostrum from the very first milkings directly after birth. Because the immunoglobulin content is higher the earlier the milking takes place, first-milking colostrum is considered particularly rich. Also look out for a standardised IgG content and gentle drying, ideally by freeze-drying.
Who is colostrum not suitable for?
Since it is a dairy product, colostrum is unsuitable with a milk protein allergy and to be treated with caution with lactose intolerance. For vegans it is not an option as an animal product. During pregnancy and breastfeeding, with autoimmune or immune conditions, and when taking medication, you should consult a doctor beforehand.
How do you take colostrum powder correctly?
Stir the powder into cool water, milk, a shake or yoghurt – not into boiling-hot liquid, to protect the delicate proteins. Many take it in the morning on an empty stomach or with some time from a protein-rich meal. There is no universal dose; follow the manufacturer's information, since products differ greatly in IgG content.
Health notice: This guide is for general information purposes only and does not replace individual medical or pharmaceutical advice. Food supplements are not a substitute for a balanced, varied diet and a healthy lifestyle. If you have health concerns, are pregnant or breastfeeding, or are taking medication, please consult a doctor or pharmacist. How our guides are created →
Sources
- Dietary Supplements – Yes or No? — Verbraucherzentrale
- Health assessment of food supplements — German Federal Institute for Risk Assessment (BfR)
- Colorful Pills for a Clear Conscience – What Do Dietary Supplements Actually Do? — German Nutrition Society (DGE)
- Food supplements — European Food Safety Authority (EFSA)
