The consistency of your menstrual flow really isn’t a reliable indicator of anemia or poor nutrition. Instead, heavy blood loss can cause anemia, and insufficient calorie intake can stop your period. However, the color and consistency of your period flow can be watery and pink one day and turn chunky and bright red the next. It also depends on hormone levels, other medications and cervical mucus, so don’t count on period blood flow to be an indicator of anemia or nutrition.