Colostrum: What the First Milk Is, Forms and Use

Colostrum is the first milk that a mammal forms in the first days after birth. This so-called first milk or beestings differs markedly in its composition from the later mature milk: it is thicker, more yellowish and particularly rich in protein, immune factors and growth substances. In food supplements, mostly bovine colostrum from cow's milk is used, which is obtained in the first hours to days after calving and gently dried. Anyone dealing with colostrum should know what it consists of, in which forms it is offered and what to pay attention to when taking and buying it. This guide sorts the facts factually, without giving health-related promises of effect.

What exactly is colostrum?

Colostrum refers to the pre-milk that cows, but also humans and other mammals, produce immediately after birth. Its biological task is to supply the newborn in the first days of life with a concentrated package of nutrients and defence substances before production switches to mature milk. Compared with normal cow's milk, bovine colostrum contains considerably more protein and less fat and milk sugar.

Characteristic are the immunoglobulins it contains, above all immunoglobulin G, as well as lactoferrin, various growth factors, enzymes and oligosaccharides. The exact content varies depending on how early after calving milking took place: the closer to the time of birth, the higher typically the proportion of the bioactive components. After about 48 to 72 hours the first milk already transitions into the so-called transitional milk, and the content of the mentioned substances falls. For this reason, manufacturers attach importance to obtaining the colostrum as early as possible after calving.

Important is the classification: colostrum is a natural food and not a standardised pure substance. Its composition varies from batch to batch, depending on animal, feeding and season. Therefore, the specification of standardised parameters, such as the immunoglobulin G content, is an important feature of reputable products.

Origin and occurrence

The colostrum used for food supplements comes predominantly from dairy farming. It arises when cows calve and, in the first days, form more first milk than the calf takes in. For human consumption, usually only the surplus that goes beyond the calf's needs is used, because supplying the calf takes priority. The quality depends strongly on the keeping of the animals, the milking time and the further processing.

Human colostrum plays a role above all during breastfeeding and is not used in supplements. Besides cattle, there are occasionally products from goat colostrum, but these are rare. By far the largest part of the market is based on bovine first milk, often advertised from pasture keeping. Statements such as pasture keeping or origin from a certain region are a quality and trust feature for many buyers, but on their own say nothing yet about the content of the bioactive components.

Forms and processing

Colostrum is offered in different dosage forms. Most common are freeze-dried or spray-dried powder, which can be filled into capsules or stirred in loose. The drying method is important because heat can alter the sensitive protein structures. Freeze-drying is considered particularly gentle, but is more elaborate and expensive. Spray-drying is cheaper and widespread, but works with higher temperatures depending on the process.

• Powder: versatile to dose, can be stirred into cold drinks; the inherent taste is mild and milky.
• Capsules: practical and taste-neutral, but usually a lower single dose per capsule.
• Chewable tablets or lozenges: widespread above all in the sports sector and practical on the go.

A quality feature is the stated content of immunoglobulin G, which is often standardised for high-quality products. Since colostrum contains milk components, it is not suitable for people with cow's milk allergy. The lactose content is lower than in normal milk, but not zero. Some providers additionally enrich colostrum or combine it with other ingredients, which makes comparing pure products more difficult.

Intake and dosage

There are no uniform specifications for dosage, since colostrum is classified as a food and no official reference values exist. Manufacturers mostly recommend between one and several grams of powder per day, often divided into one to two portions. Many users take it on an empty stomach, for example in the morning before breakfast, so that the protein substances it contains do not meet directly with a large meal.

If colostrum powder is used, it should be stirred into cold or at most lukewarm water, since hot liquid can impair the protein structures. For the same reason, colostrum is not intended for cooking or baking. Use over several weeks is common; some users use it in courses with breaks. In principle: stick to the dosage instructions on the packaging and do not exceed the recommended daily amount without reason. Those who are new often begin with a smaller amount and increase slowly to test tolerance.

What to look for when buying?

When buying, a look at several points is worthwhile. First the origin: statements about the keeping and the milking time give indications of the raw material quality. Second the processing: gentle drying preserves the bioactive components better. Third the declaration: reputable providers state the immunoglobulin G content and the exact composition.

Pay attention also to purity and testing for residues, since it is an animal raw product. Products without unnecessary additives are preferable. The price per gram of pure colostrum is more meaningful than the pure package price, because some products are heavily stretched with fillers. An independent analysis certificate that proves content and purity is a good sign. The packaging also plays a role: light-protected, well-sealable containers protect the sensitive powder from moisture.

Safety and tolerance

Bovine colostrum is well tolerated as a food in usual amounts. Since it contains milk protein and residual lactose, it is unsuitable for people with cow's milk allergy and only of limited use with pronounced lactose intolerance. At the start, gastrointestinal irritations such as a feeling of fullness can occasionally occur, which can usually be avoided with a lower starting dose.

Colostrum is no substitute for a balanced diet and no treatment of diseases. If you are pregnant, breastfeeding, take medication permanently or have health complaints, speak with your doctor before taking it. Children should only receive food supplements after consultation. Store colostrum dry and cool and observe the best-before date, since natural dairy products are sensitive.

Suitable products

Colostrum is often mentioned in connection with the digestive tract. Anyone who wants to supplement their everyday life occasionally combines it with a culture complex that provides various bacterial strains in a defined germ count, for example a preparation with several strains and a high number of colony-forming units. Such products are selected according to composition, strain diversity and germ count, not according to promises of healing. The selection should always suit the individual dietary situation and complement a varied diet, not replace it.

Common misunderstandings about colostrum

Around colostrum some ideas circulate that require a sober classification. A common misunderstanding is that more immunoglobulins automatically mean more benefit. The stated content initially says something only about the composition of the raw material, not about a certain effect in the body. Likewise, colostrum is sometimes lumped together with true ginseng or other superfoods, although it is an animal dairy product with a composition entirely of its own.

A further point concerns expectations: colostrum is a food and not a medicine, which is why it neither treats diseases nor replaces a healthy way of life. Those who try it should regard it as one possible supplement within a balanced diet. The origin statement alone is also no guarantee of quality; it should always be read together with information on processing, content and purity testing.

Frequently Asked Questions (FAQ)

What exactly is colostrum?

Colostrum is the first milk or beestings that mammals form in the first days after birth. In supplements, mostly bovine colostrum from cow's milk is used, which is rich in protein, immunoglobulins and growth factors.

How is colostrum taken?

As a powder it is stirred into cold or lukewarm water, often in the morning on an empty stomach. Capsules are swallowed with water. Stick to the manufacturer's dosage instructions and do not exceed the daily amount.

Is colostrum suitable for people with lactose intolerance?

Colostrum contains less lactose than normal milk, but not zero. With mild intolerance it is often tolerable, with strong intolerance only to a limited extent. For people with cow's milk allergy it is not suitable.

How do you recognise good colostrum?

Indications are statements about the origin and the milking time, gentle drying, a stated immunoglobulin G content and few additives. The price per gram of pure colostrum is more meaningful than the package price.

Can I take colostrum permanently?

Many users use colostrum in courses over several weeks. With permanent intake, existing illnesses, during pregnancy and breastfeeding, you should seek medical advice beforehand.