7. You suffer from iron deficiency
A diet low in iron is often to blame for feeling tired—a lack of red meat in the diet of vegetarians and vegans can result in iron deficiency, but it’s unfair and untrue to assume that people who cut out animal products from their diet automatically have low energy levels. People who eat meat can still suffer from low iron as well, especially if they skimp on wholesome—though sometimes unappealing—foods like spinach, organ meats, and eggs. Women in particular are prone to anemia because of menstruation, as heavy periods can easily lead to anemia in combination with a low-iron diet.