Preparation of dual supramolecular EGCG-carboxymethyl chitosan: Structure, antioxidant and anti-inflammatory properties.

In the field of cosmetics, epigallocatechin gallate (EGCG) is highly valued for its multiple effects such as delaying photoaging, whitening, anti-allergy, acne removal, astringency, and moisturizing. However, due to the active chemical properties of EGCG, there are challenges in terms of stability and transdermal absorption, which limits its widespread application in cosmetics. Therefore, we utilized supramolecular modification technology to form supramolecular carboxymethyl chitosan-EGCG-trehalose (CC-EGCG) by combining EGCG with carboxymethyl chitosan and trehalose, enhancing its stability.

Azelaic Acid: Mechanisms of Action and Clinical Applications.

AZA is a non-phenolic, saturated dicarboxylic acid with nine carbon atoms, naturally produced by the yeast Malassezia. It has diverse physiological activities, including antibacterial, anti-keratinizing, antimelanogenic, antioxidant and anti-inflammatory effects. AZA is widely used in dermatology and is FDA-approved for treating papulopustular rosacea.

Lactic Acid Chemical Peeling in Skin Disorders.

Lactic acid is the most widely occurring natural organic acid in nature. It not only exhibits mild and safe properties but also possesses multiple physiological activities, such as antibacterial effects, immune regulation, and promotion of wound healing, making it one of the most popular chemical peeling agents. Chemical peels are commonly used in the field of aesthetic dermatology as a non-invasive therapeutic approach.

Human lip vermilion: Physiology and age-related changes.

Background: The human lip vermilion, also known as the red lip, is important to the quality of life and has long attracted the attention of cosmetic researchers. However, there is limited existing literature on the physiological characteristics and age-related alterations in the human vermilion.

Objective: We aim to provide an overview of the physiological characteristics and age-related alterations in the human vermilion.

Poly traditional Chinese medicine formulation prepared with skin moisturizing properties.

Many traditional Chinese medicine compositions can moisturize the skin and utilize in cosmetics. Using a combination of Chinese Medicine Materials and guided by Traditional Chinese Medicine principles, this study selected Echinacea purpurea to protect the skin barrier, Dendrobium nobile to clear heat and promote fluid production, Sophora flavescens to clear heat for diminished inflammation, and Aloe vera combined Lycium barbarum to nourish yin, to together form a "poly TCM moisturizing formulation." These poly plant extracts were investigated and optimized for the stability, safety, and moisturizing ability.

In vivo Raman spectroscopy study on the stimulation mechanism of surfactant.

Background: Surfactant is widely used in skin care products and cleansers, while it may cause physical discomfort. In this study, in vivo Raman spectroscopy was used to explore surfactant irritation mechanism on skin, which was not found in literature.

Methods: Sodium dodecyl sulfate (SDS) was chosen to represent surfactant.

Dual effects of alpha-arbutin on monophenolase and diphenolase activities of mushroom tyrosinase.

The effects of α-arbutin on the monophenolase and diphenolase activities of mushroom tyrosinase were investigated. The results showed that α-arbutin inhibited monophenolase activity but it activated diphenolase activity. For monophenolase activity, IC50 value was 4.