Strategies to Reduce Iron Deficiency

Inclusion Criteria * Donors who have donated whole blood or double red cells ≥ 2 times in the last 12 months if female, or, ≥ 3 times in the last 12 months if male. * Commitment to meet the donation frequency requirement for the study for two more years, give a blood sample at each visit, and complete baseline and follow-up surveys. Exclusion Criteria * Subjects \< 18 years of age. * Subjects taking iron supplements (including multivitamins with iron) up to one month prior to enrollment. * Females who are pregnant or plan to become pregnant in the following 2 years. * Subjects unwilling to meet the requirements of the study.