Nutritional Interactions - Nutrient-Nutrient Interactions

Question 1

What are nutrient-nutrient interactions?

Answer 1

• When one nutrient impacts on another nutrients bioavailability
• Nutrients effect another nutrients bioavailability in a (+) or (-) way
• Competition between elements with similar chemical characteristics
• Can be short or long term

Question 2

What 4 types of interactions can occur?

Answer 2

• Macronutrients with vitamins
• Macronutrients with minerals
• Minerals with minerals
• Vitamins with vitamins

Question 3

Why is it important to know about nutrient-nutrient interactions?

Answer 3

To evaluate the consequences if any of these integrations on health and disease and to understand the bioavailability of nutrients

Question 4

What are the;
Water soluble vitamins,
Fat soluble vitamins,
Minerals & Trace elements

Answer 4

Water soluble vitamins - Vit C and B- Vits
Fat soluble vitamins - A D E K
Minerals & Trace elements - Fe, Ca, K. Na, I

Question 5

What are the shared characteristics of vitamin C, vitamin E and β-carotene?

Answer 5

• Act as antioxidants

- React with free radicals

Question 6

Ascorbic acid (vitamin C) enhances the absorption of which minerals? 
And reduces the absorption of what other minerals?

Answer 6

Enhances iron and selenium

Reduces copper, nickel and manganese

Question 7

What other vitamin does vitamin C interact with for full antioxidant effect?

Answer 7

Vitamin E

Question 8

What other mineral does iron interact with?

Is absorption enhances or reduced?

Answer 8

Zinc

Iron reduces zinc absorption (.vis versa)

Question 9

Is serum zinc an accurate indicator of body zinc status?

Answer 9

No, serum zinc had limitations when used as an indicator of zinc status.

Question 10

Does zinc affect iron absorption the same when taken in aqueous solution rather than in solid food?

Answer 10

Yes. Zinc ingested from aqueous solution impaired Fe absorption more than in solid food

Question 11

In what form are nutrients with highest interaction rates taken?

Answer 11

As supplements

Question 12

What mineral does manganese commonly interact with?

What is a common British example of reduced iron by manganese?

Answer 12

Iron (Fe).

Manganese in tea drinkers imposed risk of reduced iron utilisation

Question 13

What mineral can calcium interact with?

What is an example of a food item than can reduce iron absorption?

Answer 13

Iron.

Bread on a burger can reduce iron absorption from meat by 50%