The Right Way to Take L Carnitine to Boost Your Training 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 What Defines the Best FatBurning PreWorkout Supplement? AlabamaAgeline.gov When to Take L Carnitine for Weight Loss & Maximize Results 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