The concept and function of biotin
Also known as vitamin H. It is the coenzyme of many carboxylases and carboxyltransferases in animals. It is involved in the metabolism of fat, carbohydrates, proteins, amino acids, nucleic acids, etc. It is the normal development and health of animal skin, coat, meat toes, hooves, reproductive system and nervous system. The maintenance is indispensable.
When the pig lacks biotin, it grows slowly, loses hair, and the dry phosphorus sheet on the skin can ooze brown liquid, the tongue is cracked, the hind legs are stiff, the soft heel is eroded, the heel and cuticle are cracked, and the reproduction is reduced; when the poultry is lacking, Beak and toe dermatitis, deformed paws, decreased egg hatchability, fatty liver and kidney syndrome (FLKS), slow growth, and reduced survival rate. Preliminary data prove that biotin can also enhance the growth-promoting effect of copper, reduce backfat thickness, and improve ketone body quality. Biotin is widely present in all protein-rich feedstuffs, especially in peanuts, but the content of biotin is very high, but the variation is great, and there is very little biotin in feedstuffs rich in starch such as most grains and cassava flour. The biotin in corn, soybean meal and animal protein feed can be fully utilized, and the available biotin in other feed is very low. The availability of biotin in chickens to wheat and its by-products is about 0--20%. Microorganisms in the digestive tract of animals can synthesize a small amount of biotin. The research in the past ten years has shown that due to the large changes in feed content and low utilization rate, biotin provided by natural feed alone cannot meet the needs of livestock and poultry, and industrially produced biotin must be added; adding a higher amount of biotin It can improve the disease resistance of livestock and poultry, prevent chicken fat liver-kidney syndrome (FLKS), reduce chicken sudden death, reduce chicken leg disease, and prevent productivity decline caused by livestock and poultry stress. Adding biotin to pig and chicken feed can generally increase production and reduce feed consumption, especially the effect of barley and wheat-based diets is obvious. The amount of biotin in the diet is affected by many factors. The diet contains high energy, especially the diet with high unsaturated fatty acid content and high protein. Biotin needs to be increased. In addition, some inhibitory factors affect its requirement. Egg protein contains avidin, which can bind to biotin and make it inactive. Adding a large amount of antibiotics and other antibacterial drugs to the feed, or digestive tract diseases can inhibit or affect the synthesis of biotin by microorganisms and the absorption and utilization of biotin by the digestive tract. Feed rot can cause the destruction of biotin. Part of biotin can be replaced by inositol.