Inulin: Are there dangers associated with using this prebiotic fibre on the skin?

Inulin is one of many plant-based raw materials used in cosmetology. This ingredient can be obtained, among other sources, from Jerusalem artichoke and chicory. It is credited with beneficial properties for the skin, such as hydration and rebalancing of the skin microbiota. But what about the potential dangers it may pose when applied topically?

Contrary to its oral consumption, the use of inulin on the skin is safe and does not cause skin irritation. The concentrations of inulin in skincare are generally between 0.5 and 3%. Furthermore, there is no danger associated with the interaction of inulin with other ingredients.

Nevertheless, like any active ingredient, there may be instances of side effects emerging, potentially linked to allergic reactions, although this is quite rare. Furthermore, these reactions could be more related to its inclusion in certain cosmetic products, which can impact skin sensitivity.

As a precaution, it is advisable to consistently perform a skin test on each new product introduced into one's skincare routine by applying it to the crook of the elbow, the inner wrist, or behind the ear to observe any possible skin reactions. If an adverse effect appears, it is recommended to stop using the product and quickly consult a doctor.

The available data regarding its safety for the skin of pregnant and breastfeeding women, as well as children, is not sufficient to make a definitive statement on the subject. Therefore, we advise you to consult with your doctor before using a cosmetic product containing inulin if you are in a similar situation.

• HETLAND R. B. Risk assessment of "other substances" – Inulin. Vitenskapskomiteen for mattrygghet (2016).

• SZMUC E. & al. Inulin as an effectiveness and safe ingredient in cosmetics. Polish Journal of Chemical Technology (2019).