Had some mito tests done and my carnitine esters came back practically non-existent. Carnitine free and total were within range. See below. Carnitine esters: 1 (3.8-19.0) Carnitine free: 39 (25.0-55.0) Carnitine total: 40 (31.0-67.0) Does anyone know of the significance of low esters only? Has anyone else had this? Thx!