Mid-range grade. La roche-posay belongs to the middle class, la roche-posay belongs to L 'Oré al Group's cosmeceutical brand, and Yang Ya belongs to Pierre Faber Group, the second largest French private pharmaceutical company. La roche-posay belongs to L 'Oré al's third-line brand, and L 'Oré al Group is a relatively expensive cosmetics group, which was established in 1907. La roche-posay is not high-end, it belongs to the mid-range, but the effect is good. The formula of la roche-posay products is simplified to avoid allergens to the greatest extent. La roche-posay's products only contain 18 ingredients on average, while general skin care products contain more than 40 ingredients, especially Tean series for sensitive skin. The key to the success of la roche-posay brand lies in its safe and effective internal ingredients, and its rich selenium content is very important to human metabolism. Its special physical and chemical properties endow it with many dermatological medicinal values, such as anti-inflammatory, antipruritic, wound healing, anti-free radical and immunomodulatory effects. These effects have been confirmed by the official public health and social departments and some professional medical institutions through in vitro research and in vivo experiments on humans and animals.