How to delay your period Bonus 7 questions that explain Period Delay Vitamin B12 deficiency, sometimes called cobalamin deficiency, happens when your body is either not getting enough or not absorbing enough vitamin B12 from the foods you eat. Vitamin B12 is an important Vitamin B12 Deficiency: Signs, Symptoms, Reasons and Treatment Graphic Era Hospital Can Low Iron Stop Your Period? FAQs On Iron Deficiency & Menstruation Ferosom Forte How Often Can I Take B12 Injections? Heavy Periods Vitamin B12 Pacific Center for Naturopathic Medicine