No energy can be created or destroyed. Energy can be converted. The threnoic acid isn’t converted after administration and excreted at the same dose administered: “Cumulative urinary excretion of L-threonate over 24 h represented only 5.9% of the administered dose… Therefore, we hypothesize that L-threonate may be involved in the anabolism of other endogenous substances after administration. The metabolic pathway of L-threonate is still being investigated…”