Examples of Drug-Nutrient Interactions DRUGS That Can Affect Nutrients Bioavailability Alcohol-nutrient interactions Antacids (containing calcium or aluminium) may decrease the absorption of the supplemental iron, vitamins A, E, D, K and folate [4]. H2 blockers (ranitidine) and proton pump inhibitors (omeprazole) decrease stomach acidity (hypochlorhydria), which may decrease the absorption of vitamin B12, iron and calcium [5,15,16,24]. Antibiotics: Sulfonamides, […] The post Nutrient-Dr...