Recent research indicates that the utilization of crystalline amino acids (like L-lysine, DL-methionine and L-threonine) varies significantly between commercial poultry and swine production systems. In poultry, crystalline amino acids such as lysine, methionine, and threonine are extensively used to optimize feed formulation and improve growth performance (Lemme et al., 2004).
). Poultry metabolism exhibits a high efficiency in amino acid utilization, allowing for precise dietary adjustments to meet rapid growth demands (Ravindran et al., 2008). Conversely, swine diets also incorporate crystalline amino acids; however, pigs display a different amino acid absorption and metabolism profile, influenced by their longer digestive transit time and differing enzymatic activity (Gatlin et al., 2007). Studies suggest that pigs may utilize crystalline amino acids less efficiently than poultry due to differences in gut morphology and microbial fermentation (NRC, 2012). Moreover, the relative bioavailability of crystalline amino acids can vary between species, impacting their incorporation into body proteins (Wang et al., 2016).
In poultry, the rapid digestion and absorption facilitate more immediate utilization, whereas swine may experience a delay, affecting amino acid efficiency (Swiatkiewicz & Koreleski, 2015). Additionally, the proportion of crystalline amino acids in diets is often higher in poultry feed formulations, reflecting the need to meet high amino acid demands with minimal feed intake (National Research Council, 1997). The differences in amino acid utilization are also influenced by dietary energy levels, with poultry diets often being more energy-dense, impacting amino acid metabolism (Mateos et al., 2012).
Overall, species-specific differences in digestive physiology, metabolism, and dietary formulation strategies account for variations in crystalline amino acid utilization. Future research should focus on quantifying bioavailability and optimizing crystalline amino acid supplementation across species (Liu et al., 2019).
Conclusion
Promois International (www.promoisinternational.com) is one of the best-known manufacturers of the mentioned amino acid.
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