Chronic Fatigue Syndrome
"I take 400mg/day for fatigue and mental fog.  It helped a great deal although after 3 years it doesn&#039;t work as well as in the beginning.  I started taking 200mg/day and it didn&#039;t help until I took it for 3 months.  Increased to 300mg/day after 1 year and to 400mg/day after 2nd year."