Niacin Flashcards Preview

Nutrition > Niacin > Flashcards

Flashcards in Niacin Deck (22):
1

is it a trace element, vitamin, or mineral? Niacin

vitamin B3

2

what are its properties? Niacin

Extremely stable to heat, light, acid, alkali, oxidation

3

what are its two functions? Niacin

 Carbohydrate, fat and energy metabolism  Coenzymes

4

what are the details of its function as a coenzyme for NAD? Niacin

Removal and transfer of hydrogen atoms

5

what are its two coenzymes? Niacin

Nicotinamide Adenine Dinucleotide (NAD),  Nicotinamide Adenine Dinucleotide Phosphate
(NADP)

6

what are the details of its function as a coenzyme for NADP? Niacin

Synthesis of fat

7

what is the deficiency disease? Niacin

pellagra

8

what are the four D's of pellagra? Niacin

Dermatitis, Diarrhea, Dementia, death

9

what happens with Dermatitis in pellagra? Niacin

Black tongue in dogs
 Atrophy of taste buds

10

what are the four things that happen with Dementia in pellagra? Niacin

Mental confusion, irritability, psychosis, delirium

11

when and where in the US was pellagra a problem? Niacin

Early 20th century in Southern US

12

where is pellagra a problem today? Niacin

Today in SE Asia & Africa

13

what three types of diets/foods create a risk of pellagra? Niacin

Low protein diets,  Cornbread (staple)  Molasses

14

why isnt pellagra a problem in Central America where corn is a staple also? Niacin

Niacin bound to a protein

15

what are the recommended intakes? Niacin

M 16 mg; F 14 mg

16

where is it increased? Niacin

Increased in high protein, but meats are high in protein

17

what are the four toxicity side effects? Niacin

 Liver dysfunction & damage
 Blurred vision & edema of eyes
 Glucose intolerance
 Flushing

18

what is flushing (toxicity side effect) used to do? Niacin

 Used to reduce LDL
cholesterol and increase
HDL cholesterol (200 mg)  Old treatment for schizophrenia, Raynaud’s Disease (3 g/d)

19

what is Raynaud’s Disease? Niacin

lose circulation in finger?

20

what are the six main food sources? Niacin

Milk, meats, poultry, fish, whole grain & enriched cereals

21

what is there a lot of in meats and milk and why is this important? Niacin

Tryptophan can be converted to niacin

22

how much trytophan is in this? Niacin

60 mg Tryptophan = 1 mg niacin (1 niacin equivalent (N.E.))