L carnitine supplements bioavailability is very less and according to some studies it takes 8 to 12 weeks for for loss results, so if you decide to supplement with oral L carnitine do take it in Pharmacokinetics of L Carnitine Clinical Pharmacokinetics Springer Nature Link Labrada L Carnitine 3000mg (Orange) 450ml with Super Charge Pre Workou LABRADA INDIA Pharmacokinetics of L Carnitine Clinical Pharmacokinetics Springer Nature Link