In intensive duck farming systems, maintaining stable growth and feed efficiency is an important objective. Betaine is commonly used in animal nutrition as a functional additive because of its role as an osmolyte and methyl donor. By helping regulate cellular water balance, betaine supports physiological stability and digestive function, particularly in environments where animals may experience heat or metabolic stress.

Betaine also participates in methyl group metabolism, which is associated with protein synthesis and nutrient utilization. In duck feed formulations, this function may contribute to efficient growth and balanced metabolism. Including betaine in diets is therefore considered a practical nutritional approach to support performance and adaptability in commercial duck production systems.