https://www.healthline.com/nutrition/vitamin-deficiency?slot_pos=article_4&utm_source=Sailthru%20Email&utm_medium=Email&utm_campaign=generalhealth&utm_content=2021-11-08&apid=36929682&rvid=cded95459555b445d044db2977410c97aa2ce21d0688c96624f02c326c3915c1#The-bottom-line
