Cholesterol

Skin-Identical Lipid

Also known as: Cholest-5-en-3β-ol

Description

Cholesterol is an essential component of the stratum corneum lipid matrix, constituting approximately 25% of its total lipid content alongside ceramides (~50%) and free fatty acids (~25%). Together, these three lipid classes form the lamellar bilayers that create the skin's permeability barrier. Topical cholesterol is used in barrier repair formulations to restore the physiological lipid ratio disrupted in conditions such as atopic dermatitis, xerosis, and aged skin. It is particularly critical in elderly skin, where cholesterol synthesis declines disproportionately. [Elias 2005]

Mechanism of Action

Cholesterol integrates into the lamellar lipid bilayers of the stratum corneum, where it modulates the fluidity and organization of the intercellular lipid matrix. In the equimolar ratio with ceramides and free fatty acids, cholesterol enables the formation of the orthorhombic and liquid crystalline lipid phases necessary for optimal barrier function. It reduces transepidermal water loss (TEWL) by completing the lipid matrix. In cholesterol-deficient states (aging, atopic dermatitis), topical supplementation accelerates barrier recovery and normalizes lamellar body secretion. [Man 1993]

Indications

  • Impaired skin barrier [Man]
  • Atopic dermatitis [Elias]
  • Xerosis / dry skin [Man]
  • Aged skin barrier dysfunction
  • Post-procedural barrier repair
  • Adjunct to topical corticosteroid therapy
  • Irritant contact dermatitis

Available Concentrations

1%2%3%5%

Side Effects

  • Non-irritating [Elias]
  • No known adverse effects at cosmetic concentrations

Contraindications

  • Known hypersensitivity (extremely rare)

Pregnancy Category

Not classified (generally considered safe)

Found In

Cosmetics containing Cholesterol

CeraVe Foaming Facial CleanserCeraVe (L'Oréal)CeraVe Moisturising CreamCeraVe (L'Oréal)Dot & Key Blueberry Hydrate Barrier Repair Sunscreen SPF 50+ PA++++Dot & KeyDot & Key Ceramide & Hyaluronic Acid MoisturiserDot & KeyEarth Rhythm Phyto Ceramide Deep Moisture CreamEarth RhythmFoxtale Hydrating Daily Moisturiser with Ceramides & Hyaluronic AcidFoxtaleRe'equil Ceramide & Hyaluronic Acid MoisturiserRe'equil

Related Conditions

Atopic Dermatitis Barrier lipid — restores cholesterol-deficient intercellular lipid matrix in eczematous skin Xerosis Barrier repair — completes the ceramide-cholesterol-fatty acid triad for optimal moisture retention Contact Dermatitis Barrier restoration — replenishes lipid matrix disrupted by irritant or allergic insult Rosacea Barrier support — reinforces the compromised lipid barrier in rosacea-prone skin

References

  1. Elias PM. "Stratum corneum defensive functions: an integrated view." J Invest Dermatol, 2005. doi:10.1111/j.0022-202X.2005.23668.x
  2. Man MQ, Feingold KR, Elias PM. "Exogenous lipids influence permeability barrier recovery in acetone-treated murine skin." Arch Dermatol, 1993. doi:10.1001/archderm.1993.01680280049007

Limitations

This page provides a general overview of Cholesterol in dermatology. It does not cover every possible use, formulation, or interaction. Individual responses to compounds vary — what works for one person may not work for another. Always consult a qualified dermatologist before starting or changing any treatment.