Most oral L carnitine supplements are glorified flavored chemical waters., , Low bioavailability = very little of it actually gets picked up for use by the body., , So when companies sell $40$60 Ratiopharm L Carnitine 35g Weight Loss Fat Loss Injection, 1200mg at 8000 box in Panchkula Systemic regulation of L carnitine in nutritional metabolism in zebrafish, Danio rerio Scientific Reports 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