Vitamin B9-Folic Acid
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Folic acid is a yellow, crystalline substance, sparingly soluble in water and stable in acid solution. However it undergoes fairly rapid destruction when heated in neutral or alkaline substances. It may thus be destroyed by some methods of cooking. Factors that damage this vitamin are sulphur drugs, sunlight, and food processing.
Folic acid is absorbed along the entire length of the intestine, although the jejunum of the small intestine is the primary site for its absorption. About half of the folic acid stored in the body is in the liver which contains 5 to 15 mg/kg of liver weight. A small amount is excreted in the faeces and urine but the additional amounts are presumed to be metabolized and also lost by cells coming off in scales from body surfaces.
Vitamin B9 Folic Acid Sources and Functions
Vitamin B9 Healing Properties, Deficiency Symptoms and Precautions
Vitamin B9 Cures for Anaemia, Sprue, Abortions, pigmentation and Gout

