Brassica Campestris Seed Oil

Brassica Campestris (rapeseed) seed oil is a lipid emollient typically used at several percent up to high levels in moisturizers, where it is generally well-tolerated and supports barrier function. Clinical experience and patch testing data suggest a low irritancy profile, but like many botanical oils it can still trigger irritation or rare allergy in highly reactive or eczematous skin, especially on compromised barriers. Given the sensitive-skin benchmark and the need to avoid underestimating risk, it fits best as very gentle rather than inert. Safety Notes: In commercial skincare, Brassica Campestris (rapeseed) seed oil is frequently used at very low levels (~0.05–1%) as an emollient slip agent or lipid co-emulsifier in creams/lotions and some rinse-off cleansers where it appears mid-to-late INCI. At the high end, it is sold to consumers as pure carrier oil and as the primary oil phase in anhydrous body/face oils, balms, and oil cleansers, reaching 70–100% in OTC products. No specific global cosmetic maximum applies beyond general safety/impurity controls, so the observed market ceiling is set by neat-oil products rather than regulation.