A Study to Compare the Tolerability of Microencapsulated Iron Compared to a Conventional Iron Supplement in the Market

* Healthy premenopausal women (Age: 18-50)

* Not anemic

* Normal Iron status: hemoglobin (>12 g/dL)

* Normal BMI (20-25 kg/m²)

* Normal blood profile at screening: Complete blood count, platelets, Glucose, HbA1c, Electrolytes (Na, K, Cl), AST, ALT, bilirubin, y-GT), Creatinine, eGFR, blood urea nitrogen, uric acid, Total protein (albumin/ globulin)

* Subject is in good physical health as established by medical history, vital signs, physical examination and electrocardiogram (ECG)

* Normal urine profile at screening: pH, protein, glucose, nitrite, ketone, bilirubin, urobilinogen, red blood cells, leukocytes, creatinine, sediments, absence of bacteria

* Regular menstrual cycle (28 +/- 5)

* Willingness not to change eating habits (do not start/ change of diet) and general habits (stop smoking) for the duration of the study

* C-reactive protein: < 5mg/L.

* Previous participation in iron tolerability trials.

* Participation in a clinical research trial within 30 days prior to randomization

* Chronic medication (except oral contraceptives)

* Pregnancy or lactation

* Hb levels < 12g/dL (women) (anemia)

* Reported chronic disease

* Infectious disease

* Alcohol or drug abuse

* Hyperlipidemia as defined by LDL > 3.36 mmol/L (130 mg/dL) and/or triglycerides > 2.26 mmol/L (200 mg/dL).

* Relevant co-morbidities: Gastrointestinal disease such as peptic ulcer, enteritis, or ulcerative colitis, inflammation, pre-existing poorabsorption or liver disease, kidney disease, iron-storage disorders such as hemochromatosis, haemosiderosis, or chronic autoimmune inflammatory condition

* Serious illness that may confound study results or interfere with compliance

* Any other laboratory abnormality, medical condition or psychiatric disorder which in the Investigator's opinion may adversely affect the subject's ability to complete the study or its measures or which may pose significant risk to the subject

* Known intolerance to oral iron supplements

* Intake of iron suppl. and/or multivitamins containing iron during the last three months before study entry

* Use of any mineral/vitamin or other supplements during the past month prior to study

* Subject has a known allergy to the test material's active or inactive ingredients

* Individuals who are cognitively impaired and/or who are unable to give informed consent

* Any active medical illness in last 48 h

* Sexually-active females who are not willing to use an effective form of birth control.

* Subjects with severe premenstrual symptoms (PMS)

* Subjects that have followed specific diet, eg. high protein diet, within 30 days prior to study start

* Previous gastric bypass, sleeve gastrectomy, or gastric band surgery

* Blood donation within the previous 1 months.