Brewer’s Yeast powder 3 lbs.


Brewer’s Yeast Improves Fiber Digestion. A rich source of B Complex vitamins. Also contains amino acids.

We regret to announce that our Brewer’s Yeast supplier is discontinuing this product. We will be searching for a replacement, however with our high standards and selection of only the finest products, it may take some time. Check this product page for updates.

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Product Description

Brewer’s Yeast Improves Fiber Digestion

The improved nutrient digestion and feed efficiency has a wide array of benefits for livestock at different stages of life, especially during growth, breeding, mid-to-late gestation, and early lactation.

A variety of livestock and companion animals have benefited from Brewer’s Yeast in their diets for a number of years for improved fiber digestion.

Many research studies have been conducted to determine the efficacy and mechanism of the action of yeast. A common finding in these research studies is an improvement in fiber digestion, which indicates that feeding yeast results in a change in rumen microbial activity. The first study evaluating yeast in livestock diets was reported in 1983. Since then, yeast has become a common additive to livestock diets.

Improved Fiber Digestion

Cattle and dairy cows are ruminant herbivores. Thus, in the wild, they consume almost all forage which is high in fiber. Domesticated livestock should be fed mostly forage diets with concentrated supplements fed as needed. Supplements provide additional essential amino acids, minerals, vitamins, and energy needed to support the targeted activity (breeding, gestation, growth, etc). Supplements may also supply various additives targeted at improvement of overall performance or health.

Ruminants themselves do not produce the enzymes to digest fiber, but provide the environment and harbor the microorganisms that actually digest the fiber in the rumen. These microorganisms ferment fiber and available non-structural carbohydrates to volatile fatty acids, which the animal then uses for energy. These microorganisms also break down protein (that was not digested in the small intestine) to ammonia and re-assimilate the nitrogen from ammonia and urea (recycled from the blood) into microbial protein. Some of the microbial protein is digested and utilized by the livestock for its own amino acid needs.

Yeast and Digestion of Feeds

Yeast appears to have an important role in the microbial digestion process. The precise mode of action has not been identified yet. However, the most common finding in research studies with yeast shows an increase in the fiber-digesting bacteria population and fiber digestibility.

Yeast is a potential source of vitamins and/or growth factors. For example, thiamine from yeast increased viability of a ruminal fungus in one reported study. Other researchers have isolated yeast components that stimulate growth of cellulolytic bacteria under laboratory conditions. Georgia researchers proposed that yeast was supplying certain organic acids that favor the proliferation of lactate utilizing bacteria (S. ruminantium).

Yeast appears to improve feed palatability, which helps maintain a more consistent feed intake.

Yeast culture seems to be especially valuable when forage quality is less than optimum, regardless of the class of animal being fed. Injured livestock and animals recovering from illness also benefit from yeast supplementation. In addition, milk cows in late gestation and early lactation particularly benefit from yeast culture supplementation.

Growing Young Cattle

Several studies have shown improvements in growth of young cattle fed yeast culture. Ciro (1991) reported weanling calves fed brewers yeast culture were five kg heavier and had a 10% faster growth rate than those not fed yeast culture over a six-month period. This improvement in growth rate may well be the result of improved feed digestibility. It is believed that yeast produces B-vitamins, proteins and other essential nutrients that beneficial microbes may use for increased growth. The result is improved digestibility of protein, fiber and minerals along with improved protein and mineral retention.

In Conclusion

Feeding Brewers Yeast can provide a benefit in ruminants’ diets by improving feed digestion and nitrogen retention. Increased fiber digestion and better feed efficiency are the most common benefits of yeast supplementation in ruminant diets. The improved nutrient digestion and feed efficiency has a wide array of benefits for ruminants at different stages of life, especially growth, breeding, mid-to-late gestation, and early lactation.


Vitamin B2 – 1 mg. per ounce
Vitamin B1 – 3.54 mg. per ounce
Niacin – 14.15 mg. per ounce
Choline – 137.5 mg. per ounce
Folic Acid – 1.37 mg. per ounce
Pantothenic Acid – 3.45 mg. per ounce
Crude Protein – 42.0%
Crude Fat – 0.1%
Crude Fiber – 7.0%
Moisture – 10.0%
100% pure Brewer’s Yeast is a rich source of B Complex vitamins and also contains amino acids.

Our Brewer’s Yeast comes in a 3 pound package. A 3 pound package is 48 ounces.

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Calves: 1 to 2 Tablespoons

Dairy Cows: 10 to 20 Tablespoons

Sheep, Goats, Llamas & Alpacas: 1 to 4 teaspoons

Chickens, Ducks & Pheasants: 1/4 to 1/2 teaspoon

Pigs: 3-5% by weight of feed

Cats: 1/4 to 1/2 teaspoon

Small Dogs: 1/4 to 1/2 teaspoon

Medium Dogs: 1/2 to 1 teaspoon

Large Dogs: 1 to 2 teaspoons


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