absorption interaction
11 interactions related to absorption interaction
levothyroxine + calcium
Calcium significantly reduces levothyroxine absorption
levothyroxinecalciumabsorptionabsorption interactionsupplement timingthyroid medicationhypothyroidismTSHantacidscalcium supplements
levothyroxine + iron
Iron reduces levothyroxine absorption by up to 65%
levothyroxineironabsorptionabsorption interactionsupplement timingmedication timingthyroid medicationhypothyroidismTSHferrous sulfate
levothyroxine + magnesium
Magnesium can reduce levothyroxine absorption
levothyroxinemagnesiumabsorptionabsorption interactiondrug supplement interactionsupplement timingmedication timingTSHthyroid medicationantacids
curcumin + piperine
Piperine (black pepper extract) increases curcumin bioavailability by up to 2000%
curcuminpiperineabsorptionabsorption interactionnutrient synergysupplement interactionsupplement timingdrug supplement interaction
vitamin c + iron
Vitamin C significantly enhances non-heme iron absorption (up to 6x)
vitamin cironabsorptionabsorption interactioniron absorptioniron deficiencyiron deficiency anemiaferrous sulfatesupplement timing
omega-3 + vitamin d
Fat from omega-3 improves fat-soluble vitamin D absorption
omega-3vitamin dabsorptionabsorption interactionfat-soluble vitaminsfish oilsupplement timingbone healthnutrient synergy
magnesium + zinc
High-dose magnesium (>142mg) can interfere with zinc absorption
magnesiumzincabsorptionabsorption interactionsupplement timingmineral absorptionzinc absorptionzinc supplementZMA supplements
calcium + iron
Calcium inhibits iron absorption by up to 60%
calciumironabsorptionabsorption interactioniron absorptionsupplement timingcalcium supplementferrous sulfateprenatal vitamins
antibiotics + calcium
Calcium can bind to certain antibiotics and reduce their absorption
antibioticscalciumabsorptionabsorption interactiondrug nutrient interactiondrug supplement interactionsupplement timingciprofloxacindoxycycline
metformin + vitamin b12
Long-term metformin use depletes vitamin B12 levels
metforminvitamin b12absorptionabsorption interactiondrug nutrient interactiondrug supplement interactionsupplement interactionsupplement timingantacids
iron + zinc
Iron and zinc compete for absorption when taken together in high doses
ironzincabsorptionabsorption interactioniron absorptionzinc absorptionsupplement timingferrous sulfateprenatal vitaminsZMA supplements