Less time is spent outdoors combined with sunscreen use contributes to vitamin d deficiency. - GreenMedInfo Summary
Vitamin D Deficiency, Its Role in Health and Disease, and Current Supplementation Recommendations.
J Am Osteopath Assoc. 2017 May 1 ;117(5):301-305. PMID: 28459478
Kim M Pfotenhauer
Vitamin D deficiency has been identified as a common metabolic/endocrine abnormality. Despite known dietary sources of vitamin D and the role of sunlight in its production, much of the US population may have inadequate levels of serum 25-hydroxyvitamin D. Deficiency of vitamin D can be caused by a variety of health conditions, but studies on the effects of vitamin D supplements have had mixed results. This evidence-based clinical review discusses what is currently known about vitamin D and what areas need further research to clarify its role in health and disease.