Vitamin D is the all-encompassing name for a family of similar chemical components needed in the human body, said Courtney Pelitera, M.S., R.D.N., C.N.S.C. , a registered dietitian nutritionist at VNutrition.
Madeleine Haase is an Assistant Editor at Prevention. With a strong background in health writing from her time at WebMD and her academic research in biopsychology, cognition, and neuroscience, she focuses on themes such as health and wellness, alternative medicine, and consumer health. Madeleine's work has been featured in prominent outlets including MSN, Yahoo Finance UK, Women's Health, and Runner's World Magazine.















