The SEPHORA Hydrating Scalp Serum is a scientifically formulated product designed to improve scalp health and hydration. The serum contains a combination of active ingredients that work synergistically to nourish and moisturize the scalp. One key ingredient in the serum is hyaluronic acid, a naturally occurring molecule in the body known for its ability to retain moisture. Hyaluronic acid helps to hydrate the scalp by binding water molecules and preventing transepidermal water loss. This promotes a healthy scalp environment and helps to alleviate dryness and itching. Another important component of the serum is panthenol, also known as pro-vitamin B5. Panthenol functions as a humectant, attracting and retaining moisture in the scalp. It has been shown to improve the skin barrier function and enhance the skin's ability to retain hydration. Additionally, panthenol has anti-inflammatory properties that can help soothe irritation and redness on the scalp. Furthermore, the SEPHORA Hydrating Scalp Serum contains ceramides, lipid molecules that play a crucial role in maintaining the skin barrier. Ceramides help to prevent water loss, strengthen the skin barrier, and protect against environmental stressors. By replenishing ceramides in the scalp, this serum helps to improve the overall health and resilience of the skin. In terms of properties, the serum has a slightly acidic pH (around 5.5), which is in line with the natural pH of the scalp.