Measuring Iron Bioavailability From Oral Iron Supplements in Healthy Pre-menopausal Women Using Stable Isotopes

Inclusion Criteria: * Healthy pre-menopausal women * Aged 19-49 years * With low iron stores (below 30 μg/L serum ferritin; normal range 30-100 μg/L). Exclusion Criteria: * Allergy to iron supplements * BMI above 25 * Pregnant * Post-menopausal women * History of alcohol or substance abuse * Reported history of CVD, diabetes, cancer, kidney, liver or intestinal disease, gastrointestinal disorder * Use of drugs likely to alter gastrointestinal function * Donated blood recently (within the last 3 months prior to screening visit)