l-carnitine absorption with food or empty stomach Carnitine Deficiency: What Is It, Causes, Symptoms, and More When to take L-carnitine –
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If severe hypoglycemia is not treated quickly with a sugar called dextrose, it can result in a coma and even death

If your goal is to increase fat metabolism or endurance performance, then direct L-carnitine supplements make more sense, Zenker says

Supplements are a good idea for people with naturally low L-carnitine levels: older adults, vegans, and vegetarians
