Hydrolyzed Rhizobian Gum

Hydrolyzed rhizobian gum is a polysaccharide derived from rhizobia bacteria, commonly used in skincare formulations as a film-forming agent. When hydrolyzed, it becomes a smaller molecular weight polymer that can form a protective layer on the skin's surface, helping to reduce moisture loss.The ingredient is also studied as a prebiotic dietary fibre, which means it may support beneficial gut bacteria. Emerging research suggests a connection between gut health and skin condition, though topical use in skincare products primarily functions as a film-former rather than a prebiotic agent.

On the skin's surface, hydrolyzed rhizobian gum forms a thin, breathable film. This film acts as an occlusive layer, slowing water evaporation from the epidermis and helping to maintain skin hydration. The film-forming action is non-comedogenic, meaning it sits on the surface rather than clogging pores.When consumed as a dietary fibre, preliminary research suggests it may support the gut microbiome by promoting the growth of beneficial bacteria and increasing short-chain fatty acid production. However, this systemic effect is distinct from its topical skincare function.

This ingredient is typically included in cleansers, moisturisers, and serums. Since it functions as a film-former, it works best when applied to clean, damp skin to help lock in hydration. It pairs well with hydrating ingredients such as glycerin or hyaluronic acid, and can be used twice daily as part of a standard skincare routine.

Hydrolyzed rhizobian gum is generally well-tolerated in topical skincare. It is unlikely to cause irritation or allergic reactions, though those with known sensitivities to gum-derived ingredients should patch-test first.