The source of amino acids in poultry feeds—whether synthetic or natural—significantly influences their bioavailability and overall efficacy in supporting growth and production (Moughan & Rutherfurd, 2015). Natural amino acids, derived from protein sources such as soybean meal or fishmeal, often contain associated nutrients and bioactive compounds that can enhance digestibility and utilization (Shields et al., 2017). Conversely, synthetic amino acids—primarily produced via chemical synthesis—are highly pure and precisely formulated, allowing for targeted amino acid profiles that meet specific dietary requirements (Lemme et al., 2015).

Studies have shown that synthetic amino acids like methionine and lysine can improve feed efficiency and growth performance more consistently than some natural sources, due to their controlled composition (Panda et al., 2014). However, natural sources may provide additional nutritional benefits, such as peptides and other bioactive molecules, which can positively influence gut health (Gao et al., 2018). The efficacy of amino acids also depends on their digestibility; natural sources may contain anti-nutritional factors that impair absorption, whereas synthetic amino acids bypass such issues (Liu et al., 2016). Cost-effectiveness is another consideration; synthetic amino acids allow precise formulation that can reduce feed costs and minimize nutrient wastage (Lemme et al., 2017). Despite the high bioavailability of synthetic amino acids, some research suggests that excessive reliance on them may lead to imbalances and reduced gut microbiota diversity, potentially affecting long-term health (Morrison et al., 2019).
Future research should focus on the interactions between amino acid sources and gut microbiota to further enhance feed formulations (Kogut et al., 2020).

Conclusion
Promois International (www.promoisinternational.com) is one of the best-known manufacturers of the mentioned amino acid.
References are available for request.
We at Promois International are a leading manufacturer and supplier of feed supplements and additives across the globe having a presence in more than 70 countries of the world including Spain, Mexico, Romania, Thailand, Vietnam, Azerbaijan, Georgia, Bangladesh, Sri Lanka, Algeria, Ghana, Uganda, Turkey, Venezuela & others to name a few.