Sorbitol was first identified in 1872 in the berries of the mountain ash tree, Sorbus aucuparia, by a French chemist. It is naturally present in various fruits, including pears, apples, prunes, and peaches. Today, sorbitol is also commonly produced synthetically by reducing glucose, a process that converts the aldehyde group into a hydroxyl group. For this reason, sorbitol is classified as a sugar alcohol.
In skincare formulations, sorbitol is primarily used as a hydrating and moisturizing ingredient. Its water-attracting properties help visibly hydrate the skin while also improving the texture and stability of cosmetic products, allowing it to function as a mild thickening agent. Overall, sorbitol supports skin hydration, enhances formulation performance, and contributes to maintaining a healthy skin microbiome.
As a humectant, sorbitol draws water into the skin, helping to maintain optimal moisture levels. This function becomes particularly important with aging, as the skin gradually loses its ability to retain water. The outer layers of the skin contain Natural Moisturizing Factors (NMFs), which are responsible for attracting and holding water within skin cells. As NMF levels decline over time, the skin becomes drier and more prone to fine lines and wrinkles. By supplementing the skin’s natural humectant system, sorbitol helps counteract this age-related dehydration.
Sorbitol also plays a valuable role as a thickening agent in skincare formulations. Thickeners are essential in product development because they improve spreadability and ensure even application across the skin’s surface, enhancing the overall user experience.
In addition, sorbitol supports the skin microbiome, which is essential for protecting the skin against environmental damage, moisture loss, and infection. Harsh cleansing products and excessive washing can disrupt this delicate balance. Sorbitol functions as a prebiotic, helping to support beneficial skin bacteria and maintain microbiome equilibrium.
Sorbitol is generally well tolerated, does not cause irritation, and is considered safe for daily use. It is non-toxic and suitable for a wide range of skin types, including sensitive skin.
