Hi, From past few weeks I'm feeling weak and restless always I wishes that I can sleep. Apart from all these I am not able to concentrate on my studies. I'm also my other similar issues are there. Even I'm having poor lifestyle being a hosteler don't get any proper diet. So, can I take a single capsule of Re-vital H a day for next 10-15 days or I can go any other options if yes please tell me the substitute Will it help me or not.