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MACADAMIA TERNIFOLIA SEED OIL.

Valuable CAS 128497-20-1 / 129811-19-4 / SKIN CONDITIONING - EMOLLIENT

Macadamia Ternifolia Seed Oil is a nourishing botanical oil rich in monounsaturated fatty acids, offering significant moisturizing, skin-softening, and barrier-restoring benefits. Its composition closely mimics human sebum, facilitating rapid absorption and promoting skin suppleness and elasticity.

Summary

Emollient Skin-softening Nourishing Moisturizing Antioxidant Barrier support Promotes cell renewal

Science

Mechanism of Action

This oil functions as a potent emollient and moisturizer, primarily due to its high concentration of monounsaturated fatty acids, notably oleic and palmitoleic acids. Palmitoleic acid, similar to skin's natural sebum, enhances absorption and reinforces the skin's protective barrier, while linoleic acid minimizes transepidermal water loss. Beyond hydration, its phytosterols contribute to cell membrane integrity and offer calming, reparative effects, supporting barrier function. The oil also provides antioxidant protection by reducing reactive oxygen species, protecting skin from environmental stressors, and promoting cell renewal for improved elasticity and reduction of visible wrinkles.

Research

Clinical Evidence

Medium confidence
Effective range N/A
Optimal

15%

Key findings

  1. 01 A 15% nanoemulsion containing Macadamia oil demonstrated a significant 51.5 ± 3.7% improvement in skin hydration, notably higher than a conventional emulsion (26.9 ± 2.7%) and control (3.8 ± 2.3%). This effect was attributed to the oil's occlusive properties reducing transepidermal water loss.
  2. 02 Regular application of a Macadamia oil nanocream formulation over 4 weeks increased facial skin moisture by 45.83%, successfully transitioning skin from a dry to a normal moisture condition.

Transparency

Dusting Analysis

Not commonly dusted

As a liquid oil, this ingredient is not typically subject to 'dusting' concerns, which are relevant for dry, powdered ingredients.

The Formula

Formulation

Solubility
Oil
Optimal pH 6 – 7
0 7 14

Stability

Macadamia Ternifolia Seed Oil is a light, non-greasy oil with excellent spreadability. Its low polyunsaturated fat content contributes to high oxidative stability, making it well-suited for a variety of formulations, including heavy creams and suncare products. It also assists in stabilizing other fat-rich preparations due to its intrinsic antioxidant properties. The oil itself maintains an optimal pH range of 6.0-7.0.

Safety

Safety Profile

CIR Status
Safe as used
Sensitization risk Low

The CIR Expert Panel has deemed Macadamia Ternifolia Seed Oil, along with related macadamia oils, safe for cosmetic use, citing a history of safe use in food and an absence of dermal irritation or sensitization data. While the FDA mandates labeling for macadamia nuts in food due to potential allergies, this concern does not extend to topical cosmetic applications, where safety is assessed according to 21 CFR 740.10.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Macadamia Ternifolia Seed Oil is a valuable emollient and moisturizer, clinically shown to enhance skin hydration and barrier function, making it ideal for nourishing and protecting various skin types.

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References

Sources