The nutritional value of beer yeast used in feed additives

1. Nutritional value of beer yeast

Beer yeast is a byproduct of beer brewing, rich in various nutrients:

Protein (40%~50%): Contains essential amino acids such as lysine and methionine, suitable for animal growth needs.

Vitamin B family (B1, B2, B6, B12): promotes metabolism and immunity.

Minerals (zinc, selenium, iron): enhance disease resistance.

β - glucan and mannan oligosaccharides: regulate gut microbiota and improve digestion and absorption.

2. Applicable animals and their functions

(1) Livestock and poultry breeding (pigs, chickens, cattle)

Promote growth: High protein can replace some soybean meal or fish meal, reducing costs.

Boosting immunity: β - glucan enhances intestinal barrier function and reduces diarrhea.

Improve meat quality: Increase the content of unsaturated fatty acids in muscles.

(2) Aquaculture (fish, shrimp)

Lure: The natural aroma of yeast enhances the palatability of feed.

Reduce water pollution: Reduce nitrogen emissions and improve water quality.

(3) Pet feed

Used in cat and dog food to supplement vitamins and prebiotics, and maintain healthy fur and fur.

3. Instructions for use

Direct addition: Grind into powder after drying, and mix with feed in proportion (usually 1%~5%).

Fermentation treatment: Increase the content of active ingredients (such as enzymes and small peptides) through probiotic fermentation.

Liquid supplement: Fresh beer yeast liquid can be used as a liquid feed additive (attention should be paid to preservation).

4. Advantages and Environmental Significance

Resource recycling: Reduce environmental pollution caused by brewery waste (wet yeast slurry).

Economy: The cost is lower than traditional protein raw materials such as fish meal.

Green and healthy: No antibiotics or chemical additives, in line with the trend of antibiotic free farming.

5. Precautions

Drying and storage: Wet yeast is prone to spoilage and needs to be dried or sealed for fermentation in a timely manner.

Addition control: Excessive amounts may cause animal bloating (yeast gas production).

Matching formula: The nutritional ratio needs to be adjusted according to the animal species and growth stage.

6. Practical application cases

European countries: Using beer yeast in cow feed to increase milk production and fat percentage.

Chinese aquaculture: Adding 3% yeast powder to the feed of South American white shrimp can increase weight gain by 10% to 15%.

Pet food: High end brands use yeast extract as a natural seasoning.