Stearic acid is a saturated fatty acid commonly used in the cosmetic and pharmaceutical industry. It occurs naturally in a variety of sources, including animal and vegetable fats. Stearic acid is used as an emulsifier, thickener and texturing agent in creams, lotions, balms and makeup products. It helps stabilize formulations, improve product consistency and provide a creamy feel. Stearic acid is also used in candles, soaps and lubricants.