Ceratonia Siliqua Gum

Ceratonia Siliqua Gum (carob/locust bean gum) is a polysaccharide thickener/stabilizer typically used at low concentrations (~0.1–2%) and is generally well-tolerated in leave-on and rinse-off products. Patch-test and clinical use data suggest a low irritation profile, but rare contact sensitivity or irritation can occur, particularly in highly reactive or eczema-prone skin when barrier function is compromised. Given the small but real risk of idiosyncratic reactions despite overall gentleness, it best fits a "very gentle" score rather than inert. Safety Notes: Ceratonia Siliqua (carob/locust bean) gum is used primarily as a natural rheology modifier/film former, and in many leave-on serums/lotions it appears at very low levels (~0.01–0.1%) to slightly boost viscosity and sensory feel, often in combination with other gums or carbomers. In consumer rinse-off cleansers and some thicker leave-on gels/creams, commercial usage commonly reaches ~0.2–1.0% for substantial thickening and stabilization; the highest consumer-available formulations observed (very viscous gels/masks and gum-forward “natural” systems) can reach about 1.5–2.0% before texture becomes overly elastic/stringy and processing becomes difficult. No specific global cosmetic maximum limit applies, so practical/market limits are driven by aesthetics, compatibility (salts/surfactants), and stability rather than regulation.