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Chapter 10

LIFESCI 2N03 Chapter Notes - Chapter 10: Vitamin B6, Yolk, Vitamin B3 Complex

Life Sciences
Course Code
Janet Pritchard

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10.4 The B Vitamins!
also known as Vitamin B1!
RDA: 1.2 mg/day men and 1.1 mg/day women!
functions: part of coenzyme TPP used in energy metabolism!
significant sources: whole grain, fortified or enriched grain products; moderate amounts in all
nutritious food; pork!
deficiency disease: beriberi (wet, with edema; dry, with muscle wasting)!
deficiency symptoms: enlarged heart; cardiac failure; muscular weakness; apathy; poor short-
term memory; confusion, irritability; anorexia, weight loss!
no toxicity symptoms reported !
also known as Vitamin B2!
RDA: 1.3 mg/day men and 1.1 mg/day women!
functions: part of coenzymes FMN and FAD used in energy metabolism!
significant sources: milk products (yogurt, cheese); whole grain, or enriched grain product; liver!
easily destroyed by UV light and irradiation!
deficiency disease: ariboflavinosis!
deficiency symptoms: sore throat; cracks and redness at corners of mouth; painful, smooth,
purplish red tongue; inflammation characterized by skin lesions covered with greasy scales!
no toxicity symptoms reported!
also known as Vitamin B3 or nicotinic acid!
precursor is dietary tryptophan (an amino acid)!
RDA: 16mg NE/day men and 14mg/ NE day women!
upper level: 35mg/day for adults!
functions: part of coenzymes NAD and NADP used in energy metabolism!
significant sources: milk, eggs, meat, poultry, fish; whole-grains, nuts and all protein-containing
deficiency disease: pellagra !
deficiency symptoms: diarrhea; abdominal pain; vomiting; inflamed, swollen, smooth, bright
red tongue; depression, apathy, fatigue, loss of memory, head=ache; bilateral symmetrical rash
on areas exposed to sunlight!
toxicity symptoms: painful flush, hives, and rash; nausea and vomiting; liver damage, impacted
glucose tolerance !
Pantothenic Acid!
AI: 5mg/day!
functions: part of coenzyme A. used in energy metabolism!
significant sources: widespread in foods; chicken, beef, potatoes, oats, tomatoes, liver, egg
yolk, broccoli, whole grains !
easily destroyed by food processing!
deficiency symptoms: vomiting, nausea, stomach cramps; insomnia, fatigue, depression,
irritability, restlessness, apathy; hypoglycaemia, increased sensitivity to insulin; numbness,
muscle cramps, inability to walk!
toxicity symptoms: none reported !
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