D-()-3-Phenyllactic acid is widely used in the cosmetic and pharmaceutical industries due to its antimicrobial and skin-conditioning properties. It is commonly incorporated into skincare formulations for its ability to support the skin’s natural barrier and maintain a balanced microbiome. The compound exhibits inhibitory activity against various pathogenic bacteria and fungi, making it a valuable preservative in natural and organic cosmetic products. Additionally, it is studied for its potential role in anti-aging formulations because of its antioxidant effects and ability to promote smoother, more hydrated skin. In pharmaceutical research, D-()-3-Phenyllactic acid serves as a chiral building block for synthesizing bioactive molecules and antibiotics. Its natural occurrence in fermented products also links it to functional foods and gut health studies, where it may contribute to probiotic efficacy and pathogen inhibition in the digestive tract.