Hello, my name is sureshbabu. I'm working in bangalore for last 7 years. Recently I am feeling over tired ( fatique). could not do work always feeling drowsy. In year 2015 I got typhoid then after this fatique thing happened. I consulted doctor and found blood sugar level normal, thyroid normal and BP also normal. He told I have very less vitamin. so I took vitamin test and found vitamin D is deficiency for me. So that I am having calicferol granules 1 sacket per week. I am taking this sacket for more than 2 months. But still no improvement. Please help me what should I do to over come my tiredness ( fatique). Thanks