Brassica Alcohol

Brassica alcohol is a fatty alcohol derived from Brassica rapa (rapeseed). Unlike ethanol, which is volatile and drying, fatty alcohols are waxy, long-chain molecules that remain on the skin and contribute to product texture and stability.In formulations, it functions as an emollient—softening and smoothing the skin surface—whilst also helping to stabilise emulsions and control viscosity. This makes it useful in creams, serums and balms where a stable, pleasant texture is desired.

Brassica alcohol works primarily through its emollient action. The fatty alcohol molecules sit on the skin surface, forming a thin, non-occlusive layer that reduces water loss and smooths the stratum corneum. This is distinct from occlusive ingredients like petrolatum; fatty alcohols allow the skin to breathe whilst still providing moisture support.In formulations, it acts as a co-emulsifier, helping oil and water phases remain blended and preventing separation over time. This structural role means the product maintains its intended texture and efficacy throughout its shelf life.

Brassica alcohol is typically a background ingredient in formulations rather than a star active, so there are no special usage instructions. Use the product as directed by its formulation—whether that is morning, evening or both. If you have sensitive or reactive skin, patch-test first, as with any new product.

Brassica alcohol is generally well-tolerated and recognised as safe in cosmetic use. Some individuals flagged concerns about potential fungal acne-feeding properties, though evidence supporting this is limited and anecdotal.