Sure, if you suffer from constant fatigue, you may simply not be sleeping enough. Unfortunately, many get good sleep and still go about their feeling worn out. It affects concentration, productivity, mood, and energy levels.
This sluggishness or fatigue may be linked to a certain nutrient deficiency. In other words, your body's fuel is running low - on reserve energy! Your body needs energy, vitamins, and minerals, among other things, so that it is a fully and optimally functioning well-oiled machine.
There may be additional factors affecting your ability to sleep, such as the occurrence of emotional events in your life – for example, a breakup or loss, or if you suffer from depression, stress, or anxiety.