Oxaloacetate

Oxaloacetate or oxaloacetic acid (OAA) or Anhydrous Enol-Oxaloacetate or (AEO), also available under the brand name Jubilance, is nutritional supplement currently under investigation in a clinical trial for ME/CFS The Jubilance brand has limited evidence that it "may help alleviate the mild to moderate psychological and/or behavioral symptoms associated with Premenstrual Syndrome (PMS)".

Theory
Oxaloacetate is produced by the body, and additional oxaloacetate may provide mitochondria support in ME/CFS.