Besides, there are women who are chain smokers and drink alcohol who get their periods. I believe it's the mercury that has done this as it's an endoctrine disruptor and has even caused endiometriosis. There are people who eat a lot more unhealthy than me who get periods. I didn't get my periods untiil I was going on 15 and I ate meat at that time. It was actually when I became a vegetarian that I got my period the most regular, although I always had gap. Then I got a root filling and within 18 months my periods almost stopped completely.