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Nutrition

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Vitamins
Absorption and storage
Toxicity preservation in foods
Overview:
Essential organic substances
Carbon- containing
Needed in small amounts
Essential: can’t be synthesized by body
DO NOT provide energy

To be a VITAMIN:
1. Body can’t make enough to maintain health
2. Absence-> deficiency-> cured with the vitamin

Vitamins classification
Fat-soluble vitamins:
A D E K
Water soluble vitamins & choline
Thiamin/riboflavin/niacin/pantothenic acid/biotin/vitamin B-6/folate (folic acid)/Vitamin B-12/Vitamin C/choline

Vitamins: absorption & storage
Vitamin: A D E K
Fat-soluble
Absorbed with fat (40%-90% absorbed)
↓Fat absorption->↓fat soluble vitamin
Stored in Liver and Adipose tissue
B vitamins, Vitamin C, Choline
Water-soluble:
Absorbed in small intestine
High bioavailability (50%-90%)
Transported to liver-> body tissues
Inside cells activated into coenzymes
Storage limited
Cooking issues: easily destroyed

Water-soluble vitamins
CHO, FAT, PRO metabolism: thiamin riboflavin niacin pantothenic acid tiotin

Vitamin toxicity
█Fat-soluble:
Not excreted from body
Toxicity by vitamin A most frequently observed
█Water- soluble:
Excess excreted in urine
Exception: B6&B12 stored in liver
Deficiency: more than 1d needed ie: thiamin(10d) Vitamin C(20-40d)
Vitamin toxicity most frequently from supplemental sources: NOT FOODS

Vitamin preservation in foods
█Water-soluble destroyed by heat, light, air, cooking in water & alkalinity
█More ripe a F/V = more vitamin content
█Freezing retains nutrients
█Blanched first, ↑vitamin content

Minerals overview
█Individual chemical components
█essential?:
- Dietary inadequacy ->physiological or structural abnormality
- Addition to diet -> health

Categorized on a mount needed/day:
- Major: ≥200mg/day
- Trace: ≤100mg/day

█ Major minerals:
Sodium
Potassium
CHLORIDE
Calcium

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