Soap-based components are called lauric acid, myristic acid, palmitic acid, stearic acid, etc. Soap-based components are mainly divided into fatty acids and alkaline reagents. Fatty acids include lauric acid, myristic acid, palmitic acid, (stearic acid), etc. And handmade soaps because they contain saturated and unsaturated fatty acids; Alkaline reagents are mostly sodium hydroxide, potassium hydroxide, triethanolamine, etc. Soap-based facial cleanser is mainly fatty acid and alkaline agent. Harm of soap base: One of the raw materials that alkaline components destroy soap base is sodium hydroxide, which is an alkaline substance. People's facial skin will secrete sebaceous glands and sweat glands, forming an invisible protective film on the skin, which is acidic and mainly plays the role of sterilization and skin care. Then wash your face with alkaline facial cleanser, which is easy to destroy the protective effect of this protective film. So many people will feel tight and dry after washing their faces with soap-based facial cleanser.