By contrast, potassium soaps, (derived using KOH) are soft soap. Nirma beauty soap is one of the leading soaps, behind Lifebuoy and Lux. The campaign successfully convinced people that Ivory soap was medically superior to other soaps. Many soaps, shampoos, and cosmetics incorporate polyelectrolytes. Caraway fruit oil is also used as a fragrance component in soaps, lotions, and perfumes. Surfactants are commonly found in soaps and detergents. Seaweed oil is also used for biofuel, massage oil, soaps, and lotions. Consumer products include direct product sale of chemicals such as soaps, detergents, and cosmetics. Citric acid is used to soften water in soaps and laundry detergents. As with soaps and detergents, fabric softeners may cause irritant dermatitis. Hemp seed oil is used in the production of soaps, shampoos and detergents. Shaving creams commonly consist of an emulsion of oils, soaps or surfactants, and water. Quaternary ammonium compounds are deactivated by anionic detergents (including common soaps). There is also some production of oils, soaps and sweets. They are formed from the anaerobic decomposition of materials commonly found in soaps and detergents.