IDK but I always feel tired and lazy through out the day, maybe rarely I get this rush of energy, which helps me get things done.. I also feel very sleepy at times.. even though I get enough sleep.. I hate it because it makes me so unmotivated to do anything and then I procrastinate alot.. People tell me its because I might have a lack of B12... Is this true? Does anyone else know how I can solve this problem.. Or any other similar things happen to you.. It affects my school, by business, and pretty much everything.. I was hoping you guys have some good info..