Vitamin B12 Injection Side Effects and Safety Vitamin b12 in women: Dangerous ways low vitamin B12 level affects women Times of India Do you have Heavy Periods? If so you could be iron deficiency. Heavy periods affect 1 in 3 women but not talked about. The commonest issue causing iron deficiency is heavy Heavy Periods (Heavy Menstrual Bleeding) is very common. HMB affects 1 in 3 women and the most common cause for #irondeficiency and #anaemia. Despite this the UK NICE guidance does not advocate