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Ingredient directory

C10-40 Isoalkyl Acid Cholesterol Esters

A biomimetic lipid complex that replicates the protective fatty acid profile found in vernix caseosa, the natural barrier coating on newborn skin. This sophisticated emollient integrates seamlessly into the skin's lipid bilayer structure, delivering enhanced barrier repair and moisture retention capabilities that surpass conventional petrolatum-based formulations.

Directory entry · Individual source review pending

This profile is awaiting an individual source review. Treat its ratings, dose estimates and compatibility labels as provisional; they are not medical advice or proof of a finished product’s effects.

emollient skin conditioning viscosity controlling barrier repair

Science

Functions by mimicking the natural lipid architecture of healthy skin barrier, inserting into the stratum corneum's lamellar lipid bilayers to reinforce structural integrity. This biomimetic integration reduces transepidermal water loss while optimizing the skin's inherent moisture-binding capacity through enhanced lipid organization.


Research

Medium confidence
Effective range 0.5–5%
Optimal

3%

Key findings

  1. 01 Delivered 17% improvement in skin hydration with complete barrier recovery achieved within 7 days, outperforming traditional petrolatum controls

Transparency

Not commonly dusted

As a specialized lipid mimetic with demonstrated barrier repair efficacy, this ingredient is typically used at meaningful concentrations rather than trace amounts for marketing purposes.


The Formula

Solubility
Oil
Optimal pH 4 – 8
0 7 14

Stability

Demonstrates exceptional resistance to oxidative degradation and rancidity, with excellent compatibility across lipid and silicone systems

Synergies

  • other lipids
  • silicones
  • W/O emulsion stabilizers

Conflicts

  • extreme pH environments above 8 or below 4

Safety

CIR Status
Safe as used
Max tested
5%
Pregnancy
Safe
Sensitization risk Low

CIR Expert Panel confirmed safety in 2014 with maximum usage up to 5% in lip products and 3% in leave-on formulations


Your Skin

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

Our Assessment

Valuable

A scientifically-backed biomimetic lipid that delivers clinically proven barrier repair with excellent safety across all skin types.


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References

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