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General description	Hydrosoluble vitamin important in protein and fatty acid metabolism.
Found	- brewers yeast - sunflower seed - liver and other organ meats - bananas - walnuts, roasted peanuts - tuna, salmon
Anti-aging role	- metabolize protein, fats - formation of adrenaline and insulin - formation of hemoglobin - formation of antibodies - essential for maintain a healthy nervous system - lower blood level of homocysteine - useful in alleviating the symptoms of asthma
Deficiency symptoms	- Vegetarians and vegans - greasy, scaly dermatitis between the eyebrows and on body parts that rub together - low blood sugar - numbness and tingling in the hands and feet - neuritis, arthritis - trembling hands in the aged - retention of water and swelling during pregnancy - mental retardation, epilepsy - kidney stone - anemia - babies may develop crusty yellow scabs on the scalp
Therapeutic doses	50 - 100 mg combined with a B - complex supplements. RDA is 2 mg.
Maximum safe level	100 - 200 mg Doses in excess of 200 mg may cause nerve damage.
Side effects	Not established
Contraindications	Women taking combined contraceptive pills, people aged fifty - five and above and heavy drinkers have deficit
Interactions	- anticonvulsant drugs - levodopa

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