If you work indoors and wear sunblock regularly, you’re doing a good job of protecting yourself from skin cancer, but chances are you could have some level of vitamin D deficiency.
Vitamin D deficiency is common among all age groups, and it’s estimated that 1 billion people worldwide have inadequate levels (it’s recognized as a pandemic!). Additional factors such as dark skin, low HDL cholesterol (“good cholesterol”), low dairy consumption, and obesity also increase the risk of vitamin D deficiency.
via 5 Signs You're Not Getting Enough Vitamin D + What To Do About It – mindbodygreen.com.