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General description	Hydrosoluble vitamin necessary for normal DNA synthesis.
Found	- organ meats (liver) - beef, pork - eggs - whole milk - cheese - fish
Anti-aging role	- vital for normal cell activity - DNA replication - production of blood cells - production of the mood - affecting substance SAM - e. - control homocysteine level - improve cognitive function - treatment for chronic fatigue syndrome
Deficiency symptoms	- Vegans Pernicious anemia, weaknes, sore and inflamed tongue that appears smooth and shiny, numbness and tingling in extremities, irritability, depression, mental detoriation, senile dementia, paranoid psychosis, chronic fatigue syndrome, diarrhea, poor appetite
Therapeutic doses	500 - 1000 mcg. RDA - 2,4 mcg RDA for pregnant women - 2,6 mcg RDA for lactating women - 2,8 mcg European RDA - 1 mcg
Maximum safe level	3000 mcg (long and short term)
Side effects	Not established
Contraindications	Leber disease

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