How we scored it
Nucleoside C10H13N5O5: ribose + guanine, both fermentation-derived. 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
Guanosine is manufactured by fermentation of glucose using purine-producing microorganisms. This is the dominant commercial route for cosmetic grade.
In plain English
Guanosine is a nucleoside that conditions skin and helps products stay opaque. It's made by fermenting plant sugars with microorganisms.
Structure
2-amino-9-[(2R,3R,4S,5R)-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]-1H-purin-6-one
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.
- 2Guanosine. PubChem CID 135398635. National Center for Biotechnology Information. pubchem.ncbi.nlm.nih.gov ↗
- 3GUANOSINE. CosIng — European Commission cosmetic ingredient database. ec.europa.eu/cosing ↗
- 4GUANOSINE. CosIng u2014 European Commission database for information on cosmetic substances and ingredients. https://ec.europa.eu/growth/tools-databases/cosing/search?search=GUANOSINE