Xylitol is a naturally occurring sugar alcohol found in small amounts in many fruits and vegetables. It was first discovered in the late 19th century but gained prominence in the 1960s as a sugar substitute for diabetics. In skincare, xylitol has emerged as a multifunctional ingredient with several beneficial properties.

One of xylitol's primary functions in skincare is as a humectant. It has a remarkable ability to attract and retain moisture, helping to keep the skin hydrated and plump. Research has shown that xylitol can increase skin hydration by up to 25% after a single application, with effects lasting for up to 4 hours [1]. This moisture-retaining property is particularly beneficial for individuals with dry or dehydrated skin.

Beyond its hydrating capabilities, xylitol has demonstrated antimicrobial properties. Studies have found that it can inhibit the growth of various bacteria, including Streptococcus mutans and Staphylococcus epidermidis, which are commonly found on the skin [2]. This antibacterial action may help in maintaining a healthy skin microbiome and potentially assist in managing acne-prone skin.

Furthermore, xylitol has been shown to enhance skin barrier function. A study published in the Journal of Cosmetic Dermatology found that xylitol increased the expression of filaggrin, a protein crucial for skin barrier integrity [3]. This improvement in barrier function can lead to better overall skin health, increased resilience against environmental stressors, and reduced transepidermal water loss.