orgacell sc® mb

1 feed supplement, 3 active ingredients: live yeast, mycotoxin binding agent and phenol

At a glance

  • new formulation!
  • stabilizes the rumen, especially if animals are stressed
  • supports feed intake
  • new: special flavouring
  • contains bentonite, which binds the mycotoxin aflatoxin B1 in cattle, pig or poultry keeping

Our live yeast product orgacell sc® mb combines the rumen-stabilizing advantages of live yeast with bentonite‘s positive characteristics as a binding agent of aflatoxin B1, also adding yeast extract, vitamins and phenol.

Now available: New formulation!

Our well-tested orgacell sc® mb has been supplemented by phenols, which have the ability to render free radicals harmless. Free radicals have negative effects on animal health and are for example produced, if the animal is exposed to heat, a high level of stress, needs to deliver a high level of performance or is giving birth. Using phenols has shown that less vitamin E and selenium is wasted as radical scavengers (antioxidants). This prevents vitamin E or selenium deficiencies and ensures that these important substances are at the animal's disposal for growth, fertility and other tasks.


Start 1 - 2 weeks before calving and continue feeding throughout lactation and up to the dry period. 
orgacell sc® mb is also suitable for cattle fattening or for female breeding stock.

Dosage: Feed 20 g of orgacell sc® mb per cow per day.


20 kg bag

Live yeast – well-established in another field

Feeding live yeast to dairy cows and cattle is by no means a new idea. Formerly, cows were given baker's yeast dissolved in water, which usually resulted in them starting to eat after a short period of time.

Research, as it were, has caught up; and – by way of trials – has started to explain the practical observations about the effectiveness of live yeast. Test animals reacted to the live yeast with an increased feed intake and milk yield. The improved digestion of fibre material is clearly visible in the texture of the manure: the amount of fibres and kernel components in the manure decreases (see below).

The live yeast in orgacell sc® mb consists of spheres of live yeast cells, coated by a layer of inactive yeast. This ensures that the live yeast will stay inactive until it enters the rumen, all the while remaining protected from air, moisture and fermentation acids.

A well-functioning rumen is the prerequisite for healthy, high-performing, fertile cows.

Yeast has long established benefits in animal feeding. Numerous trials confirm its effects on animal health and performance.

Live yeast application – average effects of two trials

1. Field trial in France, 541 dairy cows on 22 farms
2. University of Utrecht, 67 dairy cows

production of milk fat & -protein milk yield
milk fat (g/day) milk protein (g/day)    
untreated live yeast untreated live yeast untreated (kg/day) live yeast
1.  1199 1254 (+ 55 g) 894 938 (+ 44 g) 27.1 28.6 (+ 1.5 kg/d.)
2.  1360 1380 (+ 20 g) 1170 1230 (+ 60 g) 33.8 35.7 (+ 1.9 kg/d.)

source: Lesaffre Feed Additives

Sieve test

Feed ration without live yeast
Feed ration without live yeast

Using the simplest of means, the sieve test provides the easiest way to see the effects of feeding live yeast. Put a sample of manure in a common kitchen sieve and rinse until the water runs clear. The undigested feed components will remain in the sieve. The amount and type of the residue shows the digestion’s intensity.

Feed ration with live yeast
Feed ration with live yeast

After 3 - 4 weeks of feeding orgacell sc® mb, repeat the test. Feeding of live yeast is clearly visible in the reduced volume of residue – especially the amount of maize kernels is significantly reduced.

Effects of the live yeast used in orgacell sc® mb, Saccharomyces cerevisiae, on the rumen

Live yeast consumes ruminal oxygen

orgacell sc mb: content of propionate

Oxygen is toxic for most ruminal microorganisms. Live yeast reduces oxygen, so the number of cellulose-degrading microorganisms increases. This may be observed in the animals’ manure after just a short period of time (see pictures above): fibre and kernel residue is reduced. As live yeast binds the oxygen, a higher amount of free hydrogen will be available for the formation of propionic acid.

If low-energy rations are fed in the dry period as well as during lactation, the production of propionic acid in the rumen increases. In the liver, this acid is subsequently transformed into the energy source glucose.

Live yeast keeps rumen pH at optimal level

orgacell sc mb: lactic acid-degrading microorganisms

Lactic acid-consuming bacteria are particularly stimulated and their ruminal population increases significantly.

An increased transformation from lactic acid into propionic acid further diminishes the risk of acidosis when feeding high-energy rations.

orgacell sc mb: stabilizing the pH

Ruminal pH is kept at the required level thus protecting the mucosa and microflora.

Ruminal cross-section
Ruminal cross-section

A high-capacity rumen features a dense “lawn” of villi. Due to acids, low pH levels may damage the villi in such a way that the “lawn” becomes positively riddled with holes and feed digestion deteriorates.

Please note: detoxification function ceases!

If the pH drops below 6, a vital function of the rumen will falter: The degradation of toxins by single cell organisms like protozoa. Protozoa degrade complicated molecules such as mycotoxins but require a higher pH level for maintaining their vital functions. Thus, a rumen with frequently low pH levels bears a high risk that toxins are not degraded and will get into all organs via the bloodstream further on in the intestinal tract.

Further ingredients

In addition to live yeast cells, orgacell sc® mb contains inactivated yeast and the clay mineral bentonite. A special technique that binds dust to vegetable oil ensures that the product does not stick together and makes it dust-free. Therefore the dosage can be easily mixed with other dry feed components such as cereal or mineral feed.

Inactivated yeast

Yeast contains enzymes and B vitamins (among others) and has a positive influence on the intestinal microflora. Certain substances of the yeast cell walls have binding properties and activate the animals‘ immune defence.

Bentonite as a binding agent

orgacell sc mb: aflatoxin B1 adsorption

Bentonite has a smectite content which is ≥ 70 % and has been approved by EFSA (European Food Safety Authority) as a mycotoxin binding agent for aflatoxin B1. Clay minerals such as bentonite consist of individual silicate layers which lie on top of each other like leafs. The space between the layers provides room for foreign ions and molecules like smectite. Smectite has a particularly large inner surface of 600 - 800 m² per g and is as such able to accomodate organic complexes like myco- or endotoxins and extract them from the animal.

The erratic mycotoxins

  sources adverse effects among others
aflatoxin B1 soy, peanuts, sunflowers, cotton seed etc. liver damage, contaminates the milk, carcinogenic
DON maize, wheat reduces feed intake and performance, weakens the immune system
ZON maize, wheat fertility problems
fumonisin maize liver damage
ochratoxin A (OTA) cereal kidney damage, weakens the immune system and performance
T-2 toxin cereal, maize gastrointestinal bleeding, cell count

Fungi can grow on forage both in the field and during storage. During reproduction, fungi produce toxins, which are often not visible and hard to diagnose in the animal. There is hardly any forage, which is not prone to fungus growth. According to climate, several different toxins may be found in the feed and more often than not, their harmful effect increases. In 2015, for example, 84 % of all samples in Central Europe were contaminated with DON and 75 % with ZON. According to the rumen‘s condition, microorganisms can render some of the mycotoxins innocuous. If the contamination gets too high or the animal is weakened this will result in a drop in performance, anorexia, a shaggy coat and in most cases an increased cell count due to the increased immune response of the udder. Therefore, a continuous, prophylactic administration of mycotoxin binding agents makes a lot of sense in order to keep the contamination as low as possible and ensure animal health. Live yeast and inactivated yeast optimize the functioning of the rumen and complete orgacell sc® mb‘s positive effects against mycotoxins.

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