Water soluble vitamins Flashcards

1
Q

What is the purpose of vitamins?

A

maintain health an homeostasis for growth and reproduction

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2
Q

How are vitamins obtained?

A

in the diet through consumption of natural and fortified foods and supplements

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3
Q

What may be required for vitamin transport?

A

carrier protein

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4
Q

Which vitamins may be absorbed requiring conversion to active form?

A

provitamins

  • Some vitamins are absorbed as an inactive pro vitamin or vitamin precursor and must be converted into active forms
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5
Q

What can inhibit absorption of fat soluble vitamins?

A

Low fat diet

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6
Q

Interaction with what may effect vitamin absorption?

A

Other dietary components

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7
Q

What are the water soluble vitamins?

A

B vitamins
Thiamin (b1)
Riboflavin (b2)
Niacin (b3)
Biotin
Pantothenic acid
Vitamin b6
Folate
Vitamin b 12
Vitamin C

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8
Q

What are the fat soluble vitamins?

A

Vitamin A, D, E and K

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9
Q

What are fortified foods?

A

Fortified Foods have nutrients added that are not normally found in that food (eg vitamin D in milk)


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10
Q

What are enriched foods?

A

Enriched foods have nutrients added back that have been removed during processing (enriched white flour)

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11
Q

Supplements can contain a combination of what?

A

vitamins, minerals, herbs, amino acids, botanical extracts


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12
Q

Why should caution be taken when taking supplements?

A

regulation is not a stringent as for pharmaceuticals


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13
Q

Dietary supplements cannot replace foods consumed in the diet. T or F

A

t

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14
Q

When can toxicity occur with dietary supplements?

A

if consumption goes beyond established UL


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15
Q

What is the purpose of Health Canada’s Natural Health and Non Prescription Products Directorate?

A

regulate the use of natural health products and non prescription drugs

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16
Q

What products will have an eight digit Natural Product Number (NPN) or Homeopathic Medicine Number (DIN-HM) on them?

A

Licensed products that have been reviewed and approved for use by Health Canada

17
Q

Licensed products that have been reviewed and approved for use by Health Canada; this license ensures what?

A

that any claims are supported by scientific evidence and it is produced using good manufacturing practice (GMP)


18
Q

Health claims are usually related to what?

A

dietary deficiency, not over consumption

19
Q

Approximately 40-90% of vitamins are absorbed where?

A

in the small intestine

20
Q

Fat soluble vitamins require what for absorption?

A

dietary lipids

21
Q

Water soluble vitamins may require what for absorption?

A

transport molecules or specific molecules in the GI tract

22
Q

Are fat soluble or water soluble more likely to be present at toxic levels?

A

Fat soluble

23
Q

Why are water soluble vitamins less likely to be present at toxic levels?

A

Their solubility in the blood allows them to be filtered out and excreted by the kidney when ingested in excess

24
Q

Are fat soluble or water soluble less stable and allow tissue depletion more readily?

A

Water soluble

25
Q

Most water soluble vitamins are converted to co enzymes that function in:

A
  • Energy generation
  • Hematopoiesis (blood cell formation)
26
Q

When do deficiencies first appear in water soluble vitamins?

A

in rapidly growing tissues