VITAMINS <br>In addition to carbohydrates, fats proteins, mineral salts and water, it is essential that the food of man and animals contain small amounts of the substances called vitamins, which the living organism is unable to manufacture by itself and which have to be supplied from other sources, namely diet. If anyone of some fifteen of more of these compounds is lacking in the diet, there occurs eventually a breakdown of metabolic processes that results in symptoms of malnutrition that are classed, at the deficiency diseases. Vitamins are believed to belong to ancient elementary organic compounds and to exist before life originated on Earth. According to Academician Chagovets vitamins took part in the building up of as primary organism together with such "blocks" of living matter as nucleic acids, proteins aminoacids. <br><br>Like the hormones, vitamins are considered to be very potent, and daily intake of the order of 0,1 to 5 mg is 2 adequate except in the case of vitamin С of which much larger amounts are required. In addition to being "accessory food factors" necessary for the maintenance of health and indeed for life itself, the synthetic vitamins are now recognized as being valuable therapeutic agents for treatment of deficiency syndromes and as such they may legitimately be considered as drugs.
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