Nutrients

Question 1

Antinutrient

Answer 1

natural or synthetic compounds that interfere with nutrient absorbtion

Question 2

Antinutrient: Phytic acid

Answer 2

forms insoluble complexes with metal ions ca, zinc, iron and copper. Results in precipitation, making minerals unavailable to absorb in the intestines. Found in the hulls of nuts, seeds and grains

Question 3

Antinutrients: Some proteins

Answer 3

Trypsin inhibitors and lectins in legumes. Interfere with digestion

Question 4

Antinutrients: Flavanoids

Answer 4

Group of polyphenolic compounds including tannins. Chelate metal ions such as irons and zinc and reduce their absorption and also inhibit digestive enzymes and may precipitate proteins

Question 5

Antinutrient: Excessive intake of required.

Answer 5

Excessive intake of fibre can reduce the transit time through the intestines to such a degree that other nutrients cant be absorbed.
Ca, iron, zing and mg share the same transporter in the intestines so excessive consumption of on can lead to saturation in the transport system and reduce the absorption of others

Question 6

Sulphites

Answer 6

compounds that contain the sulfite ion so32-
Added as an antioxidant and prevent browning.
increases the loss of thiamine.

Question 7

Retention factors

Answer 7

Way of calculating the amount of nutrients in food that may have been lost or gained during the process of cooking or preparation.