D,L-3-Indolylglycine is primarily utilized in biochemical research as a precursor or intermediate in the synthesis of more complex indole derivatives. These derivatives are often explored for their potential pharmacological properties, including their roles in neurotransmitter modulation and as building blocks for drug development. The compound is also studied for its involvement in metabolic pathways, particularly those related to tryptophan metabolism, which can provide insights into various physiological and pathological processes. Additionally, it serves as a valuable tool in the study of enzymatic reactions and the biosynthesis of natural products, contributing to advancements in medicinal chemistry and biotechnology.