Cholesterol
molecular structure · PubChem
AKA: >=95% (GC), POWDER, ASH
Synthetic
Emollient
Cleanser
Emulsifier
Skin Conditioner
Barrier Lipid
Clean
Cholesterol is a sterol (a combination steroid and alcohol) and a lipid found in the cell membranes of all body tissues, and transported in the blood plasma of all animals. The name originates from the Greek chole- (bile) and stereos (solid), and the chemical suffix -ol for an alcohol, as researchers first identified cholesterol in solid form in gallstones in 1784. In the body, cholesterol can exist in either the free form or as an ester with a single fatty acid (of 10-20 carbons in length) covalently attached to the hydroxyl group at position 3 of the cholesterol ring. Because of the mechanism of synthesis plasma cholesterol esters tend to contain relatively high proportions of polyunsaturated fatty acids. Most of the cholesterol consumed as a dietary lipid exists as cholesterol esters. Cholesterol esters have a lower solubility in water than cholesterol and are more hydrophobic. They are hydrolyzed by pancreatic enzymes, cholesterol esterase, to produce cholesterol and free fatty ac
Formula
C27H46O
Mol. Weight
386.70
CAS #
57-88-5
Form
Liquid
Functions
Light Stabilizer
Skin Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Emulsifying
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Viscosity Controlling
Locks In Moisture
Traditional Use
This appears to be a CAS number for cholesterol, a naturally occurring steroid found in all animal cells. Historically used in skincare for its moisturizing and barrier-repair properties, becoming a standard cosmetic ingredient in the 20th century.
Skin Types
●all-skin-types, gentle
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed3 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
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Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR