Triethyl citrate (TEC) is a colorless, odorless liquid produced through the esterification of citric acid with ethanol. While citric acid is a weak acid naturally found in citrus plants, industrial production primarily relies on the microbial fermentation of sugars. TEC is a versatile ingredient widely used in both food processing and cosmetics. In cosmetic formulations, it serves as a solvent, deodorizer, perfume fixative, and diluent. It is safe, non-toxic, eco-friendly, biodegradable, fully renewable, and an effective alternative to phthalates. TEC reduces odor by inhibiting the enzymatic decomposition of sweat components and by preventing bacteria from producing odor. Additionally, it acts as a pH adjuster, lowering the pH of formulations, which enhances its deodorizing effect since bacteria do not thrive in acidic environments. TEC also functions as a natural antioxidant and conditioning agent.