Previous studies on iron absorption have focused on the effects on the addition of iron absorption enhancers like ascorbic acid and EDTA to a meal and more recently the enzymatic phytic acid removal through phytase. The investigators want here to investigate the effects of fat on iron absorption with and without the addition of exogenous phytase as a potential iron absorption enhancer in lipid nutrient supplements (LNS) products compared to micronutrient powder(MNP) products.

Furthermore the investigators will evaluate the effects of Lipids- on iron absorption to induce the ileal brake by ingestion of a fat emulsion prior to a meal. Increasing the caloric density of a meal by increasing its fat content might enhance iron absorption by delaying gastric emptying, gastric acid secretion and increasing Fe stomach residence time.

Inclusion Criteria:

Reproductive age females 18-45 years

• Normal body mass index (17.5-25 kg/m2)
• No intake of mineral/vitamin supplements 2 weeks before and during the study
• No metabolic or gastrointestinal disorders
• No food allergies or other chronic disorders or eating disorders assessed by self-report
• Having received full oral and written information about the aims and procedures of the study
• Willing to comply with the study procedure
• Having provided oral and written informed consent

Exclusion Criteria:

• Regular intake of medication (except oral contraceptives)
• Blood donation or significant blood loss (accident, surgery) over the past 4 months
• Currently participating in another clinical trial or having participated in another clinical trial during the last 30 days prior to the beginning of this study
• Former participation in a study involving administration of iron stable isotopes
• Subject who cannot be expected to comply with study protocol
• Pregnancy or lactation