Stearic acid is a long-chain saturated fatty acid commonly occurring in animal and vegetable fats and oils. It appears as a white, waxy solid at room temperature and is widely used in food processing as an emulsifier, stabilizer, and release agent. In the human diet, it is a major component of many lipids and is metabolized via beta-oxidation. Industrially, it serves in the manufacture of soaps, cosmetics, candles, and plastics. Its amphiphilic nature, with a hydrophobic alkyl chain and hydrophilic carboxyl group, enables surfactant properties. Stearic acid is generally recognized as safe (GRAS) by regulatory bodies for direct food use and exhibits low volatility and high thermal stability, making it suitable for high-temperature applications in cooking and food manufacturing.