Regarding L-Carnitine - it naturally occurs in the body, and one can buy it as a suplement, and it is not banned by WADA, but any IV infusion with a volume greater than 50 ml in six hours is banned. We don't know yet how much was found in her body.
https://healthcare.utah.edu/clinicaltrials/trial.php?id=FP00008621
Also, it would be probably more appropriate to call it supplement that medication, but my point still stands - why to give this substance to 15 year old, along with TMZ and hypoxen? It is not banned, and it supports brain and heart function, and many bodybuilders and fitness guey use it, so one the one hand I understand it on it own, but I find it weird that's they gave two other types of substances to her, and one of them being banned.
Also, hypoxen can be bought in/from Russia only? I found it only with Russian description -
https://healthcare.utah.edu/clinicaltrials/trial.php?id=FP00008621
Something is fishy here.