How we scored it
Whole triterpene sterol obtained from lanolin (wool wax) or by yeast fermentation; all 30 carbons trace to the natural feedstock. 427/427 = 1.0.
What counts. ISO 16128-2 scores the atoms that remain in the final ingredient. Reagents, solvents, catalysts and protecting groups used during manufacture leave no mass behind and are not counted.
Where it comes from
Lanosterol is a triterpene sterol typically purified from lanolin, the natural wax secreted by sheep skin, or produced by fermentation. No significant fully-petrochemical synthesis route is used commercially.
In plain English
A natural waxy sterol that conditions skin and hair. It is typically obtained from lanolin, the natural grease found in sheep's wool, or produced by fermentation.
CosIng definition: Lanosta-8,24-dien-3-ol, (3.beta.)-
Structure
(3S,5R,10S,13R,14R,17R)-4,4,10,13,14-pentamethyl-17-[(2R)-6-methylhept-5-en-2-yl]-2,3,5,6,7,11,12,15,16,17-decahydro-1H-cyclopenta[a]phenanthren-3-ol
References
- 1ISO 16128-1:2016 and ISO 16128-2:2017 — Guidelines on technical definitions and criteria for natural and organic cosmetic ingredients and products. ISO, Geneva.
- 2Lanosterol. PubChem CID 246983. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3LANOSTEROL. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4LANOSTEROL. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=LANOSTEROL