While eating a well-balanced diet is important for all donors, simply eating iron-rich foods may not replace all the iron lost from blood donation. Taking multivitamins with iron or iron supplements, either prescribed or over the counter (from a drug store) may help replace iron lost. Iron supplements vary in name and proportion of iron within the tablet/caplet. The most effective dose, type of iron supplement, and length of treatment are currently being studied. Current recommendations range from one typical multivitamin with iron (19 mg iron) to elemental iron caplets (45 mg iron) for up to three months. Your physician or pharmacist may be able to assist you in deciding what dose, type and duration of iron supplement to choose.