I have vitamin D deficiency. Against the requirement of at least 30, my vitamin D was 3.4. My doc is giving me injections for the deficiency and has asked me to be very careful for sometime as my bones are brittle and can fracture easily.
Vitamin D deficiency is truly very common today (particularly after you start working as most people spend the whole day indoors). My suggestion to anyone who has this routine of getting up, exercising in the house and then going to work, to get your vitamin D checked.