why do my feet always smell like vinegar
Foot odor Propionic acid (propanoic acid), a breakdown product of Propionibacteria amino acid metabolism in adolescent and adult sebaceous gland ducts, is also present in many foot sweat samples.[citation needed] The similarity between the chemical structures of propionic acid and acetic acid may account for the tendency of foot odors to be identified as smelling like vinegar.[citation needed]