PAEONOL.

Paeonol enacts its diverse skin benefits through a multifaceted mechanism of action. It significantly inhibits the NF-κB pathway, thereby reducing the production of pro-inflammatory cytokines such as TNF-α and IL-6, and attenuating the expression of iNOS and COX-2. It also modulates inflammatory factors and suppresses solar ultraviolet (SUV)-induced skin inflammation by targeting T-LAK cell-originated protein kinase (TOPK), which inhibits the phosphorylation of p38, JNKs, MSK1, and histone H2AX. As an antioxidant, paeonol effectively neutralizes reactive oxygen species (ROS) and boosts the activity of endogenous antioxidant enzymes like superoxide dismutase (SOD), safeguarding skin cells from oxidative stress and contributing to the prevention of premature aging. Its skin-whitening and anti-hyperpigmentation properties stem from its ability to inhibit tyrosinase activity, leading to reduced melanin deposition and a more even skin tone. Paeonol also exhibits bacteriostatic effects against common skin bacteria such as Escherichia coli, Staphylococcus aureus, and Staphylococcus epidermidis by disrupting microbial cell membranes, thereby aiding in the combat against acne-causing bacteria. Furthermore, it supports anti-aging by promoting blood microcirculation, enhancing skin metabolism, activating cells to reduce wrinkles, and assisting in the repair of photoaging by inhibiting matrix metalloproteinase-1 (MMP-1). Paeonol provides soothing and antipruritic benefits, calming the skin, alleviating itching, and potentially suppressing pruritus through immune pathway interactions. Clinical insights also suggest its role in supporting skin barrier repair by reducing transepidermal water loss and enhancing resilience.