What it is
Juglans regia seed oil is pressed from the kernels of the English or Persian walnut and is high in polyunsaturated fatty acids, particularly linoleic and linolenic acids. It functions as a nourishing emollient that softens skin and gives oil-based or emulsion formulas a smooth, conditioning slip. In sun-care products it is used at supporting levels to enhance feel and skin conditioning.
Safety & warnings
Walnut seed oil is generally well tolerated on skin. Because it is a tree-nut-derived ingredient, those with significant tree-nut allergies may wish to exercise caution, although topical reactions are not common. As a polyunsaturated oil it can be prone to oxidation over time, so well-formulated products typically include antioxidants. It is not a fragrance allergen.
Origin & sourcing
Plant-derived. It is obtained, typically by pressing, from the seeds (kernels) of the walnut tree, Juglans regia.
Questions everyone asks
Is walnut seed oil a concern for people with nut allergies?
It is a tree-nut-derived oil, so those with significant tree-nut allergies may prefer to be cautious, though topical reactions are uncommon.
What does walnut seed oil do in skincare?
It serves as an emollient and skin-conditioning agent, softening skin and improving the feel of the formula.