Marula oil didn't irritate skin and showed measurable moisturizing and hydrating benefits in clinical testing. It's high in oleic acid (69%), which is an emollient fatty acid that helps skin retain water. The study tested 20 healthy adult women, so results may not apply to all skin types or conditions.

Researchers analyzed marula oil's chemical composition, then had 20 women apply it topically while measuring irritation, hydration, and moisture loss using specialized instruments like a Corneometer and Chromameter.

Funding not disclosed in abstract