https://www.healthcentral.com/article/low-vitamin-d-levels-symptoms-causes-and-how-to-fight-back
Osteoporosis

Low Vitamin D Levels: Symptoms, Causes, and How to Fight Back

    PJ Hamel

    PJ Hamel

    PJ Hamel is senior digital content editor and food writer at King Arthur Flour, and a James Beard award-winning author. A 16-year breast cancer survivor, her passion is helping women through this devastating disease. She manages a large and active online survivor support network based at her local hospital and shares her wisdom and experience with the greater community via HealthCentral.com.