The use of weight loss drugs, known as GLP-1s, has increased in popularity in recent years Beauty giant L'Oreal says the rise of weight loss drugs has affected beauty and skin care sales, as it designs products to specifically target some side effects of rapid weight loss. The company's head Nicolas Hieronimus said the beauty market was proving resilient in a challenging global context, and that the use of GLP-1s was "a very important phenomenon for us".