Should I use L Carnitine on rest days or just before workouts? Beyond Genetix TURN FAT INTO FUEL. PERFORMANCE INTO POWER. What is L Carnitine? It's the key that unlocks stored fat and converts it into pure energy Instagram L carnitine 15ML (25minutes before workout), Pre workout 25minutes before workout 1 recommended scoop ., Step 1 : Add L carnitine supplements before workout, Step 2: Add cardio after workout 15 30 How Much L Carnitine Per Day: Expert Guide The Science of Good Health How L Carnitine Helps with Fat Metabolism