NUTRIENT INTERACTIONS Flashcards
What are the effects of other nutrients from vitamin C?
- Enhances iron and selenium absorption
- Reduces copper and manganese absorption
- Reduces toxicity from vitamin K
- Regenerates vitamin E
- Supplementation reduced LDL levels in healthy participants, and TCL in younger participants
Discuss iron-zinc interactions and their effects on the body.
- Iron reduces absorption of zinc in aqueous solutions
- population groups with a higher requirement for zinc may be more sensitive to iron/zinc interactions
- serum zinc levels were used and may not accurately reflect zinc status therefore hypothesis cannot be confirmed
Discuss manganese and iron interactions.
- Intestine cannot differentiate between iron and manganese
- High manganese consumption in tea drinking populations increases their risk of decreased iron utilisation.
What 2 nutrients does calcium affect the absorption of?
- Reduces iron absorption (short term)
- Long term studies found no negative effects on iron status
- Calcium and manganese compete for intestinal absorption
- In presence of phytate (storage form of phosphorous) calcium may form ca-zn-phytate complexes in the intestines
What nutrients does zinc supplementation affect?
- Reduces iron and copper status
- However, in the food matrix this is not the case
What nutrients do NSAIDS, and Aspirin affect?
-lower vitamin C therefore increased risk of iron deficiency
What nutrients are reduced by antacids?
- Calcium, Iron, Magnesium and Zinc
- Long term use can reduce absorption of vitamin B12
What nutrients so anticoagulants affect?
-slows blood clotting by interfering with vitamin K metabolism
What are anticonvulsant drugs and what nutrients do they affect?
- Used in epilepsy
- causes diarrhoea and decreased appetite
- increases vitamin D turnover and catabolism
- interferes with folate
What are antihyperlipidemic drugs and how do they affect nutrient status?
- reduces blood cholesterol and fat absorption
- impacts fat-soluble vitamins
