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