2,3-Pentanedione is a food additive that also occurs naturally as a fermentation product in beer, wine and yogurt and is released during the roasting of coffee beans.

[Des-Pro2]-Bradykinin is a protease inhibitor. [Des-Pro2]-Bradykinin prevents the degradation of methionine enkephalin.

Ethylmalonic acid can be found in blood cerebrospinal fluid (CSF) and urine as well as in human fibroblasts prostate and skeletal muscle tissues. Moreover ethylmalonic acid is found to be associated with anorexia nervosa and malonyl-CoA decarboxylase deficiency. Ethylmalonic acid is a non-carcinogenic potentially toxic compound.