I am 34 years old male and is having fatigue and weakness for whole day since last 2-3 months. along with fatigue and weakness I am also low on mood. I got my b12 and d3 tested they came out 176 and 10.7 respectively. The doctor prescribed me d3 weekly shots of 60000 iu and also b12 supplement. I am taking proper diet with fruits nuts milk products still my weakness is not going away. In how many days vitamin levels be increased and my condition will improve.