p-Toluic Acid belongs to the class of organic compounds known as benzoic acids. 4-Methylbenzoic acid has been primarily detected in saliva.

Methionine sulfoxide can be regarded as a biomarker of oxidative stress in vivo.?Methionine sulfoxide is an oxidation product of methionine with reactive oxygen species.?

3-Hydroxyanthranilic acid also known as 2-amino-3-hydroxy-benzoate or 3-ohaa belongs to the class of organic compounds known as hydroxybenzoic acid derivatives. 3-Hydroxyanthranilic acid has been found in human epidermis and bladder tissues and has also been detected in multiple biofluids such as urine and blood.