Vitamin B3- Niacin Flashcards

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1
Q

Sources

A

-fortified breakfast cereals
-liver beef and fish
-some made in body

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2
Q

Functions

A

-release of energy from food
-essential for heslthy skin
-prevents pellagra

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3
Q

Deficiency

A

-Diarrhoea
-Dementia
-Dermatitis
-Death

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4
Q

Excess

A

-lead to liver damage, a high dose causes dilation of the arteries and reduction of blood lipids

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5
Q

Factors affecting absorption

A

-readily absorbed in small intestine
-alcohol inhibits formation
-sleeping pills and food processing destroys B3

-niacin made in body from amino acid tryptophan
-insoluble in water and small amounts lost during cooking

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