L Carnitine Dosage Guide: How Much Should You Take? L Carnitine L Carnitine Supplements in India Fast&Up Tip: It Works Better on an Empty Stomach, L Carnitine absorbs better when insulin is lower., Thats why a lot of people take it: , First thing in the morning, Before movement Should you eat before taking your supplement? The short answer is: it depends! While some supps serve your body better on an empty stomach, others settle best alongside food. Our NutraKey Health Acetyl L Carnitine