Science
Mechanism of Action
This ingredient actively traps moisture within the skin, preventing dehydration by enhancing the skin's water-holding capacity. Its resemblance to natural skin lipids allows it to seamlessly integrate into the skin barrier, bolstering its integrity and function. As a component of the broader phytosterol class, it also demonstrates potential anti-inflammatory and anti-irritant properties, and may stimulate fibroblast activity to promote collagen and elastin secretion, crucial for maintaining skin structure and repair.
Research
Clinical Evidence
Low confidenceN/A
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The hydroxystearic acid constituent exhibits strong resistance to oil, solvents, and water, maintaining its integrity across various temperature ranges. For optimal product stability and skin barrier support, cosmetic formulations generally benefit from precise pH control, ideally within the 4.5 to 6.5 range.
Safety
Safety Profile
The Cosmetic Ingredient Review (CIR) Expert Panel has deemed Phytosteryl Hydroxystearate safe for use in cosmetics under current practices and concentrations. Its component, hydroxystearic acid, has been safely used at concentrations up to 10% in deodorants and 2.5% in lipsticks. It is important to note that under U.S. law, cosmetic ingredients generally do not require pre-market FDA approval; manufacturers bear the responsibility for product safety.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Phytosteryl Hydroxystearate is a valuable moisturizing and skin-conditioning agent that supports barrier function and is generally well-tolerated across all skin types, with a robust safety profile.
Related
Similar Ingredients
Finding similar ingredients…