D- (-) -Tartaric acid

D- (-) -Tartaric acid (D-Tartaric acid; (S, S) -tartarate; D-threaric acid) is mainly located in the cytoplasm. D- (-) -Tartaric acid can be converted into (2S,3S) -cis-fertaric acid and (2S,3S) -trans-fertaric acid. Outside the human body, it can be found in vinegar. This makes it a potential biomarker for the consumption of this food.