I had my iron levels checked as part of an extensive free screening last summer when I had been vegan for 1.5 years.  It was smack in the middle of normal range, so no worries here.  I consume two cups of leafy greens per day on average (sometimes more or less), several servings of beans each day, and several times a week I add molasses to hot cereals or sauces etc.  I also make sure to consume fruits and vegetables high in vitamin C with these foods.  I do not take a multi vitamin with iron and never have.  Granted, I am also post surgically menopausal so I have not menstruated for seven years, although I am only 40 years old.  So my iron needs might be slightly lower than someone who menstruates.  My omnivore husband on the otherhand has been anemic for years and has to take an iron supplement.  But he also takes medications that deplete his iron stores due to another illness he has.