What it is
This is a plant-derived lipid obtained from the seeds of the Brazil nut tree, rich in fatty acids and minor amounts of tocopherols. In formulations it softens and conditions the skin and contributes to a smoother, more spreadable feel. It is typically included as a nourishing oil phase component in creams, balms, and stick products.
Safety & warnings
Generally well tolerated as a cosmetic emollient. As a tree-nut-derived oil, it may be of concern to individuals with tree-nut allergies, although refined oils contain little residual protein. Like many fatty plant oils it can contribute to a heavier, occlusive feel, which some people with acne-prone skin may find less suitable.
Origin & sourcing
Natural, plant-derived. It is expressed from the kernels (seeds) of Bertholletia excelsa, a tree native to the Amazon region of South America.
Questions everyone asks
What does Brazil nut oil do in a sunscreen?
It acts as an emollient, softening and conditioning the skin and helping the product spread smoothly. It is a supporting ingredient rather than a UV filter.
Is it suitable for nut-allergic users?
It is derived from a tree nut, so allergic individuals may wish to be cautious. Refined oils contain little residual protein, but sensitivity varies, so patch testing is reasonable.