Take a vitamin D3 addition of 1000-2000 IU daily to rectify your deficiency, but you should not miss a consultation with a healthcare professional for the personalized recommendation. If you can manage a diet of limited food, try to eat more protein sources such as eggs, yogurt, and legumes. Apart from that multivitamins can also help to bridge the nutrition gap. It is suggested to remain active during the day and catch some sun too which would support the increment of vitamin D. Cut down on both caffeine and junk food. Your health expert will, without a doubt, be the right person to turn to if you are feeling tired or have muscle weakness and you are always urged to consult a doctor. You are the main focus in the healthcare system and you are not the only one who needs care.