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PHYTOSTERYL MACADAMIATE.

Valuable / HAIR CONDITIONING, SKIN CONDITIONING

Phytosteryl Macadamiate is a sophisticated plant-derived ester that biomimics the skin's natural cholesterol esters. It is precisely engineered to reinforce the skin's lipid barrier, deliver profound hydration, and provide antioxidant defense against environmental stressors.

Summary

emollient skin-identical ingredient antioxidant

Science

Mechanism of Action

Functioning as a plant analogue to critical cholesterol esters, Phytosteryl Macadamiate effectively addresses lipid deficiencies within the stratum corneum. This action significantly strengthens the skin's inherent resistance and measurably reduces transepidermal water loss (TEWL), thereby optimizing moisture retention. Its molecular structure precisely mimics the natural lipid barrier, promoting moisture restoration, enhancing skin resilience, and aiding in the repair of damaged structural integrity by forming a protective, moisture-locking shield. Furthermore, it exhibits potent antioxidant properties, actively neutralizing free radicals and mitigating signs of premature skin aging.

Research

Clinical Evidence

Medium confidence
Effective range 1–10%
Optimal

5%

Key findings

  1. 01 Studies indicate general application concentrations from 1.0% to 10.0% provide moisturizing, anti-aging, and barrier protection effects in skin and hair care.
  2. 02 As a component of a skin surface lipid mimetic (L22), it contributes to comprehensive barrier repair and enhanced skin hydration.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Oil
Optimal pH N/A
0 7 14

Stability

Optimal esterification and a low free fatty acid content are paramount for stability. For consistent performance and integrity, standardized, cold-processed versions from reputable suppliers are recommended. It should possess a purity level of ≥90% active ingredient, an iodine value <60 g I₂/100g for superior oxidative stability, an acid value <1 mg KOH/g, and a peroxide value <5 meq/kg. Ideal appearance is pale yellow to colorless with minimal odor.

Safety

Safety Profile

CIR Status
Safe as used
Max tested
8%
Sensitization risk Low

The CIR Expert Panel concluded that phytosterols, including Phytosteryl Macadamiate, are safe for cosmetic use at current practices and concentrations. Reported maximum uses include 8% in leave-on products (e.g., moisturizers), 1% in rinse-off products, and up to 7% in lipsticks. It is generally considered safe with rare occurrences of allergic reactions or irritation, and its use is approved by regulatory authorities such as the European Cosmetics Directive.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
Yes Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Phytosteryl Macadamiate is a highly valuable, skin-identical emollient and antioxidant ingredient that significantly strengthens the skin's barrier, improves hydration, and offers protective benefits across all skin types.

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