Are there any dangers associated with the use of allantoin in cosmetic products?

In its pure form, theallantoin appears as a white and odorless powder. It is found in many plants such as comfrey, horse chestnut, and bearberry. Comfrey, in particular, is traditionally used for its healing, regenerative, and soothing properties. The content of allantoin in the root varies between 0.7 and 2.5%.

Allantoin is also naturally present in animals, particularly in the urine and amniotic fluid of mammals, but also in snail slime. For mammals, it results from the oxidation of uric acid and is produced in a similar way for cosmetic care. Allantoin can also be of synthetic origin. Its chemical molecule possesses the same virtues as that obtained naturally. The chemical synthesis of allantoin is possible through an oxidation reaction of uric acid.

This is a coveted active ingredient for its healing, keratolytic, and soothing properties. Being naturally hydrating, it helps to strengthen the skin's hydrolipidic film, to limit transepidermal water loss, and to give the skin flexibility and softness. Its soothing properties also allow it to combat inflammation and skin irritations. It is also capable of regenerating the skin by promoting the elimination of dead cells from the epidermis, leaving the skin soft.

Theallantoin is suitable for all skin types, especially if they are sensitive, irritated, damaged, and sun-damaged. It is generally used in skincare in the form of cream, balm, lotion, and sunscreen at 0.5 to 1% of the total weight.