Fat Soluble Vitamins Flashcards Preview

DEMS Unit 2 Part 2 > Fat Soluble Vitamins > Flashcards

Flashcards in Fat Soluble Vitamins Deck (10):
1

Fat soluble vitamins

ADEK

2

Vitamin

Complex Organic Substance
- Required in smaller quantities than other nutrients (except trace elements)
- Essential
- Specific functions

3

Non B-Complex

Vit C

4

B Complex categories

1. Energy metabolism
2. Hematopoietic
3. Other

5

Properties of fat soluble

- Accumulate in stores
- Require dietary fat absorption
- +/- blood transport system
- Potential toxicity with excess intake

6

Micronutrient Deficiency Risk

- inadequate or monotonous diet
- Inc. nutrient requirements
- Inc. metabolic demands
- Malabsorption
- Interactions w/ pharmaceuticals

7

Vit A

Fxn:
- Photochemical for vision (retinal signaling)
- Maintenance of conjunctiva and cornea

2 Types of food sources:
- Preformed retinyl palmitate from animal sources
- Precursor beta-carotene (yellow & green veggies)

Deficiency:
- Eyes: xeropthalmia, Bitot's spots (foamy!), night blindness
- Epithelium: linings flat, dry, and keratinized

8

Vit A Deficiency

- Eyes: xeropthalmia, Bitot's spots (foamy!), night blindness
- Epithelium: linings flat, dry, and keratinized
- Immune impairment (dysregulation, effect depends upon infectious agent; GI and measles have worst effects)

Risk:
- Low vit A intake (autistic child with severely restricted diet)
- Protein energy malnutrition
- Very low fat intake
- Fat malabsorption

9

Vit A Toxicity

NOT with beta-carotene
- only with preformed Vit A

Sx:
- Vomiting, increased ICP, headache
- bone pain, osteopenia
- liver damage hepatits --> fibrosis --> failure
- death
- birth defects

10

Lab testing for Vit A

- Serum retinol level
- Remains nl until liver stores are exhausted
- Negative APR , so decreased with inflammation