Science
Mechanism of Action
As a provitamin D2, Ergosterol undergoes conversion to vitamin D2 when exposed to ultraviolet (UV) light on the skin. Its action promotes increased mitotic activity in both epidermal cells and fibroblasts, leading to accelerated epidermal renewal and potential thickening. At the dermal level, it stimulates fibroblasts to enhance maturation and cell turnover, significantly boosting collagen synthesis, increasing the skin's water content, improving overall thickness, and elevating elasticity. Furthermore, its inherent molecular structure, featuring two conjugated double bonds, confers valuable antioxidant properties, and it plays a vital role in preserving cell membrane integrity and fluidity.
Research
Clinical Evidence
Medium confidence1.5e-7%
Transparency
Dusting Analysis
No specific data on dusting issues related to cosmetic use of Ergosterol in formulations were found in the research.
The Formula
Formulation
Stability
Ergosterol is generally stable but is susceptible to degradation by light and air, which may cause it to yellow. Exposure to oxygen can lead to peroxide formation. Optimal stability is achieved with storage at -20°C. For aqueous solutions, it exhibits limited solubility and typically requires initial dissolution in ethanol. Aqueous preparations are not recommended for storage beyond one day.
Conflicts
- acids
- strong oxidizing agents
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Panel has deemed yeast-derived ingredients, including those containing Ergosterol, as safe for use in cosmetics under current practices and concentrations, provided they meet specific criteria regarding dermal sensitization or have sufficient compositional data. While Ergosterol powder can act as a mechanical irritant to skin, eyes, and the respiratory tract, formulated Ergosterol itself does not possess vitamin D activity and did not induce toxic effects when incorporated into rat diets at a 1% dry weight concentration. It is not classified under GHS or REACH.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Ergosterol is a valuable provitamin D2 precursor and potent skin conditioner, demonstrating cellular anti-aging benefits and broad compatibility across all skin types.
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