Why Do I Feel Worse After My B12 Injection: 6 Body Reactions Does heavy menstrual bleeding mean more fertile? Are heavy periods holding you back? From pain relief to iron supplements, hear from Dr. Rachel Miller, pediatric gynecologist, about the different methods that can be used to treat heavy menstrual bleeding. B12 Injections for Weight Loss Are They Effective & Safe? B12 Shots: Benefits, Uses, Safety, Cost & How They Work Vitamin B12 deficiency can also cause menstrual irregularities, brain fog, anxiety, depression, and even a burning sensation in the feet. As these deficient RBCs deliver less oxygen to hair follicles, chronic hair