Lack of energy is a common complaint. Often, the lack of energy is transient or can be attributed to a definable organic illness. Some patients present with persistent and disabling energy deficiency, but show no abnormalities on physical examination or screening laboratory tests. In these cases, the diagnosis of chronic fatigue syndrome (CFS) should be considered. CFS is characterized by debilitating fatigue with associated muscle aches, tender lymph nodes, joint pain, chills, feverish feelings, and postexertional malaise. Diagnosis of CFS is primarily by exclusion with no definitive laboratory test or physical findings. Medical research continues to examine the many possible etiologic agents for CFS (infectious, immunologic, neurologic, and psychiatric), but the answer remains elusive. It is known that CFS is a heterogeneous disorder possibly involving an interaction of biologic systems. Similarities with fibromyalgia exist and concomitant illnesses include irritable bowel syndrome, depression, and headaches. Therefore, treatment of CFS may be variable and should be tailored to each patient. Therapy should include exercise, diet, good sleep hygiene, antidepressants, and other medications.
   Lack of energy may be due to depression, lack of exercise, poor diet with lack of adequate protein, anemia, diabetes, hepatitis, thyroid disorders, malignancy, occult infections, autoimmune disorders, sleep apnea, or adrenal insufficiency.
   If a full medical evaluation is completed and no major causes are found, certain supplements may be tried to increase energy levels.  

There are many nutrients and herbs that help support healthy energy levels, including:

B Vitamin and coenzyme complex energy supplement
Carnitine energy helper. You can buy Carnitine 500 here.
Creatine is great for muscle energy, you can find more creatine monohydrate information here
CoQ10 is helpful for energy enhancement usually at a dose of 30 to 50 mg.
Sex pills such as maca, horny goat weed, tribulus and mucuna pruriens can be used occasionally to naturally increase energy and for sexual enhancement promotion.

Eat a healthy diet for have more energy.

Energy increase questions
Q. Does a multivitamin increase energy?
   A. Some multivitamin supplements can increase energy.

Supplements and Herbal Index tongkat ali