Produced when enzymes arising from Propionibacterium acnes hydrolyze sebum triglycerides. Implicated in the pathogenesis of acne.
The combination of fatty acids with glycerol to form glycerides is sometimes reversed resulting in the presence of uncombined or free fatty acids. These are usually found in crude oils and may be removed by neutralization.
A fatty acid that is split from a triglyceride typically by hydrolysis. Fatty acids are impurities in a refined oil that are removed in the neutralizing and deodorizing process.