Which of the following is a primary function of allantoin in skin care?

Allantoin is well-known in skin care for its significant healing properties. Its primary function involves promoting tissue healing and repair, making it particularly effective for soothing irritation and supporting the regeneration of skin. This is why allantoin is commonly included in formulations aimed at treating minor wounds, burns, and other skin irritations. It helps to alleviate discomfort while enhancing the skin's ability to recover from damage.

In contrast, while moisturizing, exfoliating, and brightening are important aspects of skin care, they are not the primary roles of allantoin. Other ingredients are typically responsible for those functions: moisturizers like hyaluronic acid enhance hydration, exfoliating agents like alpha-hydroxy acids remove dead skin cells, and brightening components may include vitamin C. Therefore, the inclusion of allantoin in skin care products emphasizes its unique role in promoting healing rather than focusing on these other functions.