Amino acids are categorized into two types: animal origin, derived from sources like duck feathers, and plant origin, sourced from plants such as soybeans and corn. Amino acid fertilizers are highly beneficial for plants as they are easily absorbed, transported, and utilized as nitrogen and carbon sources. This efficiency saves the energy plants would otherwise expend to break down organic matter, synthetic nitrates, and ammonia into amino acids. Additionally, amino acids act as biostimulants, enhancing various physiological processes in plants.