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Biotin

 

 

Description

Vitamin B8 or biotin is one of the most active biological substances known. An extremely small amount of this vitamin has a marked effect on the growth of yeast and certain bacteria. It forms part of several enzyme systems. Biotin is freely soluble in hot water, but sparingly in cold water. It is insoluble in fat solvents and sparingly soluble in alcohol. Water, sulpha drugs, oestrogen, food processing techniques, alcohol, and in particular, large quantities of egg white can destroy this vitamin.

Functions

Vitamin B8 or biotin is vital for a healthy immune system. It is involved in the metabolism of carbohydrates, proteins, and fats. It is essential for the growth and health of the hair. It prevents premature greying of the hair as well as hair loss. This vitamin helps to maintain the skin and the nervous system in a sound condition. It controls proper distribution of color pigment.

Dietary sources

The rich sources of biotin are brewer's yeast, beef liver, rice bran, rice germ, rice polishings, and peanut butter. This vitamin is also normally produced in the intestines if there are a sufficient amount of healthy intestinal flora present. However, frequent use of antibiotics can interfere with the synthesis of this vitamin.
Rich Food Sources of Vitamin B8 - values per 100g mcg 
 Dried brewer's yeast  80
 Pig's kidney  32
 Yeast extract  27
 Eggs  25
 Wheat germ  12
 Wholemeal bread  6
 Fatty fish  5
 Milk, cheese and yoghurt  2

Required Intakes

 RDA mcg 
 Men  100-200 mcg
 Women  100-200 mcg
 Children  50-200 mcg
 Infants  35 mcg

Cautions

Since it is of great importance in human nutrition, deficiency of biotin causes muscular weakness, pains, pins and needles (pricking of the skin), lassitude, and lack of appetite. It may cause eczema, dandruff, hair loss and seborrhoea. Other common problems which may occur are skin disorders, heart abnormalities, lung infections, anaemia, extreme fatigue, confusion, mental depression, and drowsiness. The fleshy part of the tongue may waste away.