Effect of Coca-Cola on Iron Absorption

• Men
• Age \< 18 or \> 65
• BMI \<18.5 or \> 35
• Serum ferritin value of \<12 or \>50µg/L (±10% to allow for day to day and analytical variation)
• Volunteers will be excluded if they are found to have depressed or elevated blood pressure measurements (\<90/50 or \<95/55 if symptomatic or \>160/100)
• Diagnosed with a long-term illness requiring active treatment, e.g. diabetes, cancer, cardiovascular disease.
• Gastrointestinal disease (excluding hiatus hernia unless symptomatic or study intervention/procedure is contraindicated)
• Regular prescribed medication that may interfere with iron metabolism
• Regular use of antacids and laxatives (at least once a week)
• Women who are pregnant or less than 12 months since giving birth
• Women breast feeding
• Vitamin supplements with or without minerals if taken more than once a week, and unwillingness to discontinue occasional use for the duration of study
• Unwillingness to discontinue use of herbal supplements for the duration of study
• Use of antibiotics within four weeks prior to study start
• Parallel participation in another study which involves dietary interventions or sampling of blood that may increase the volume taken above 500ml in a 4-month period
• +3 more criteria

Contact the study team to confirm eligibility.