Will taking L Carnitine while taking Creatine Monohydrate have any mixed effects? As in will the water retention from the creatine be canceled out by the carnitine's effects? Acetyl L Carnitine Confident Health No. 1 Fertility Fertility Clinic Vitamins & Supplements for Fertility Support Alongside a balanced diet and healthy lifestyle, certain vitamins and nutrients can play Instagram L Carnitine 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.