Acetyl L Carnitine Vitamin Supplement for Neurological Health I start taking l carnitine and creatine for my weight loss journey, is this combination good ? Are there any side effects? : r Fitness_India Creatine monohydrate and L carnitine are two of the most researched supplements in the game., We are talking years. Decades. Proven over and over again., Creatine is your foundation., More strength. Creatine vs L Carnitine: Which Supplement Fits Your Goals?