Abstract
The producers must observe feed efficiency (FE) and profitability in feedlot cattle under scenarios of high production costs associated with feeding. The most efficient and persistant way to change FE is using genetic tools. However, genetic selection in cattle is slow compared to the use of feed addititves, which work to stabilize ruminal pH, induce beneficial changes in the rumen microbial population, and increase efficiency in energy and protein metabolism. The literature is extensive about antibiotics, ionophores, and non-ionophores increasing FE. Nowadays, the use of "naturals" products as growth promoters has gained great relevance, and promising results has been reported. ). Therefore, this study aimed to review the use of feed additives in beef cattle feeding.
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