Leiber offers you a variety of healthy brewers’ yeast products that can be used in various areas of pig feeding: in mineral feeds, in complete feeds or as an additive to special products. Our products are manufactured sustainably and improve the health of animals in every phase of life. Leiber Brewers’ Yeast products make an important contribution to successful production.

Product range
Leiber Brewers’ Yeast products – the best for pig feeds

Leiber YeaFi®

Together. Easy.

Leiber YeaFi® products are a unique, unmistakable and extraordinary combination of brewers’ yeast and functional fibre carriers. The brewers’ yeast is sprayed onto the fibre carrier in liquid form and dried without contact. This gentle process protects the product from demixing after handling and transport, removes the hygroscopic properties of the brewers’ yeast and increases its palatability.


Leiber® YeaFi is easy to handle:

  • Easy to dose
  • Dry and storable for a long time
  • Highly flowable
  • Fibre supplements


Advantages of Leiber YeaFi® in pig feeds:

  • Promotes gut health
  • Rich in fibre
  • Fitter sows – less repeat breeding
  • More vital piglets

We recommend the following for use in pig feeds:

Leiber YeaFi® BT: inactivated brewers’ yeast bound to spent grains – successful and traditionally good.

Leiber YeaFi® BM: inactivated brewers’ yeast bound to malt germs – with a coarse structure and rich in lignin.

In addition, Leiber YeaFi® products are also available with other fibre carriers, e.g. wheat bran or spent grains with beet pulp.
All of these are also available as finely ground variants.

Leiber Brewers’ Yeast®

Real brewers’ yeast. And really good.

Brewers’ yeast is produced in breweries in compliance with strict food guidelines and contains numerous valuable, bioavailable active ingredients and nutrients. Only real brewers’ yeasts contain the polyphenols of hops, as these are added during the brewing process. They produce additional antioxidant and bacteriostatic effects and thus complement the well-known beneficial nutritional properties of brewers’ yeast.


Advantages of Leiber Brewers’ Yeast® for pigs:

  • Contains important nutrients and active ingredients
  • Binds pathogens
  • Provides B vitamins
  • Promotes gut health

CeFi® pro

Does a pig good and tastes good.

CeFi® pro combines in one product the positive effects of beta-glucans and mannan oligosaccharides from the cell wall with the natural components of the cell interior: peptides, free amino acids and nucleotides.


CeFi® pro yeast autolysate has a pleasant taste for pigs and is already well received by piglets. CeFi® pro is therefore used in young-animal feeds and in phases of high growth performance or regeneration to stabilise the intestinal flora.


Advantages of Leiber CeFi® pro for pigs:

  • Increased palatability

  • Promotes gut health

  • Better reproductive performance

  • High growth as a plasma substitute

Biolex® MB40

Prebiotic against pathogens.

Biolex® MB40 creates a hostile environment for pathogenic germs, in which they are inhibited in a natural way. Biolex® MB40 consists of cell walls of brewers’ yeast (100% Saccharomyces cerevisiae), obtained by centrifugation after biotechnological disruption of yeast cells. During this process, mannan oligosaccharides (MOS) and beta-glucans accumulate and specifically active segments of the cell wall are released. Mannan oligosaccharides (MOS) have specific surface receptors that can bind mannose-sensitive Salmonella and E. coli and are also carbohydrates that are fermented by the intestinal flora. In addition, the glucans of the yeast cell wall have an immune-stimulating effect and promote the animals’ immune system.


Advantages of Biolex® MB40 for pigs:

  • Prebiotic effect

  • Promotes gut health

  • Binds pathogenic germs in the digestive tract

  • Strengthens the immune system

Representation of mechanisms of action Biolex® MB40

Leiber® Beta-S

Small molecule. Big impact.

Leiber® Beta-S activates animals’ immune system in a particularly effective way: the immune system reacts to the structure of the beta-glucan molecules and is put into an active state, but without being over-stimulated.


Leiber® Beta-S consists of highly purified β-1,3-1,6-glucan molecules from the cell wall of brewers’ yeast (100% Saccharomyces cerevisiae). A particularly gentle process developed by Leiber detaches the beta-glucans from the cell wall complex of brewers’ yeast. The native structure of the molecules and their biological activity are retained – unlike in conventional processes.


Advantages of Leiber® Beta-S for pigs:

  • Improves the non-specific immune response

  • Promotes the immune competence of the sow and piglets by improving colostrum quality

  • More vital piglets

  • Neutral taste – no problems with feed intake

Presentation of the main mechanisms of action of Leiber® Beta-S

  1. Uptake of ß-glucans from the gut lumen via M cells and phagocytosis by macrophages (or also via dendritic cells)
  2. Activation of macrophages increases phagocytosis and the release of reactive oxygen and nitrogen radicals (oxidative burst), antimicrobial peptides and lysozyme increased combat of pathogens
  3. Release of cytokines and chemokines recruits more immune cells. Macrophages present antigenic structures to T and B cells, causing B cells to subsequently produce antibodies
  4. Activated macrophages migrate to organs of the immune system where they break down the ß-glucans into smaller fragments
  5. In the organs of the immune system (bone marrow, spleen and lymph nodes), these ß-glucan fragments and cytokines are released, activating other immune cells such as granulocytes and NK and T cells

For healthy performance.

Gut Health

Gut Health

Good health begins in the gut.

The prebiotic ingredients in Leiber inactivated brewers’ yeast products serve as a substrate for the intestinal microbiome and effectively influence the animal’s digestive and absorption processes. Dietary fibre that is added to the feed serves the intestinal microbiome as a substrate for the production of short-chain fatty acids, thus ensuring balance in the intestine.


Gut health is of paramount importance because, on the one hand, the intestine is the factory and supplier of energy, but on the other hand, it can also be seen as one of the main routes of infection. Intestinal protection in pigs therefore always means active immune protection and thus forms an important basis for performance, health and reproduction – i.e. for your economic success.

Advantages of Leiber Brewers’ Yeast products for gut health in pigs:

  • Dietary fibre promotes gut health
  • Strengthen the immune system in the intestine through fatty acids
  • Prebiotic effect of the inactivated yeast
  • Promote performance, health and reproduction



Highly available active ingredients – efficient utilisation.

With their concentration of valuable and highly bioavailable active ingredients and other ingredients, Leiber Brewers’ Yeast products support general gut health and digestive processes.


Gut health and digestive health are closely related. If the gut is healthy, digestion can work efficiently. For the nutrition of sows, piglets, boars or fattening pigs, they provide dietetic and prebiotic mechanisms of action and sustainably support digestive processes in the animal. Efficient digestion means that fewer nutrients are excreted and instead reach their destination.


Advantages of Leiber Brewers’ Yeast products for digestion in pigs:

  • Prebiotic mechanisms of action
  • Bioavailable nutrients from brewers’ yeast
  • Improve digestive capacity
  • Increase nutrient uptake

Prebiotic effect

Prebiotic effect

Prebiotic. Promotes health.

Prebiotic mechanisms of action promote well-being, boost health and thus promote the performance of pigs in all phases. The inactivated yeasts in Leiber Brewers’ Yeast products contain prebiotic ingredients like mannan oligosaccharides (MOS), which can be used as a fermentation basis for the microbiome in the intestine. A healthy microbiome promotes gut health and digestive and absorption processes are effectively supported. Natural beta-glucan content in the yeast cell wall can also trigger an immune-stimulating effect.


Advantages of the prebiotic effects of Leiber Brewers’ Yeast products for pigs:

  • Promote gut health
  • Eubiosis in the intestine
  • Displace pathogenic germs through optimal pH value
  • Strengthen gut-associated lymphoid tissue (GALT) and the immune system

Immune system

Immune system

Positive protection against negative stresses.

The highly purified beta-glucans in Leiber Brewers’ Yeast products are ideally suited to strengthening animals’ immune responses. Negative environmental impacts due to contamination occur in every livestock building and in every feed. To protect animals from performance dips or severe disease, it is therefore important to actively strengthen their immune system. This is all the more true in piglet rearing, since piglets first have to build up their immune system and maintain it through the sow. Only if the sow has an intact and strong immune system can she pass it on to her piglets.

Advantages of Leiber Brewers’ Yeast products for the immune system in pigs:

  • Activate the indirect immune system
  • Improve specific and non-specific responses in the body
  • Promote the immune competence of young animals
  • Improve sow performance



Healthy growth

Leiber Brewers’ Yeast products support the fitness, longevity and vitality of sows, piglets, breeding boars and fattening pigs. When the performance parameters are growth, feed conversion or body mass gain, gut health and good nutrient absorption are essential for economic success. Lowering the number of diseases also leads to improved group performance.


Advantages of Leiber Brewers’ Yeast products for improved performance in pigs:

  • Increase performance through improved health
  • Improve gut health, resulting in improved nutrient absorption
  • Improve nutritional status in lactation phases
  • More vital piglets

Nutrients and active ingredients

Nutrients and active ingredients

Leiber Brewers’ Yeast: more than the sum of its nutrients

Leiber Brewers’ Yeast products are much more than just protein carriers. They are characterised by their high concentration of bioactive ingredients like beta-glucans and mannan oligosaccharides in the cell walls and nutrients like free amino acids, vitamin B complexes, minerals and trace elements. Such nutrients and active ingredients in the inactivated yeast are increasingly required for the rearing of piglets or after acute infections that have a detrimental impact on pigs’ gut health.


Advantages of the nutrients and active ingredients in Leiber Brewers’ Yeast products for pigs:

  • Tasty component
  • Promote the growth of young animals
  • Promote gut health
  • Upgrading of the feed



Fitness. Vitality. Reproductive health.

Leiber Brewers’ Yeast products effectively support the resilience and fitness of animals and have a positive effect on reproduction, breeding and rearing success.

Fertility problems in sow-keeping can be due to very different reasons. Generally, good nutrient absorption and utilisation as well as healthy digestion play a key role in the successful mating of sows and rearing of piglets.
Leiber Brewers’ Yeast contains a variety of ingredients that are important for fertility: biotin, glutathione, folic acid and niacin – to name but a few.


Advantages of Leiber Brewers’ Yeast products for fertility in pigs:

  • Help reduce repeat breeding
  • Higher piglet birth weight
  • Fewer stillborn piglets
  • Increase in litter size

Current topics from Leiber GmbH

Our contact persons will be happy to advise you.
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