Macadamia Integrifolia Seed Oil

Macadamia integrifolia seed oil is extracted from the nuts of the macadamia tree, native to Australia. It is rich in oleic acid (a monounsaturated fatty acid) and contains antioxidant compounds including polyphenols and tocopherols. In skincare formulations, it functions primarily as a skin conditioning agent.The oil has a relatively light texture compared to many plant oils, which makes it suitable for a broader range of skin types. It is typically incorporated into serums, oils, moisturisers and cleansers at concentrations between 1% and 18%, though it appears in fewer than 1% of skincare…

Macadamia seed oil conditions the skin through two main pathways. Firstly, its high oleic acid content mimics the skin's natural lipids, allowing it to integrate into the outer layers and support barrier function. This helps reduce transepidermal water loss and maintain hydration levels.Secondly, the antioxidant compounds in the oil, particularly polyphenols, can help protect skin cells from oxidative damage caused by environmental stressors. Research suggests the oil may also possess anti-hyaluronidase properties—meaning it may help slow the breakdown of hyaluronic acid in the skin—though …

Macadamia seed oil can be used daily as part of a moisturising routine, either as a standalone oil for dry skin or blended into a lightweight formulation for combination skin. It integrates well with other hydrating and antioxidant ingredients. For oily or acne-prone skin, use sparingly or choose formulations where it is present at lower concentrations blended with other actives. Patch test first if you have particularly sensitive skin.

Macadamia seed oil is generally well-tolerated and non-irritating. However, individuals with tree nut allergies should avoid products containing this ingredient.