Substances in an organism, others are an initial material for synthesis of fabric hormones. Vitamins B of the big degree provide normal functioning nervous system, muscles and other organs and many physiological systems. The level of mental and physical working capacity, endurance and fastness of an organism to influence of adverse factors depends on a level of vitamin security of a delivery of an environment, including infections and actions of toxins. In foodstuff can contain not only vitamins, but also substances - precursors - provitamins which only after of some transformations into an organism become vitamins. Disturbances of normal current of the vital processes in an organism because of a long absence in a ration of this or that vitamin.
Lead to occurrence of the serious diseases known under the general name avitaminoses. In the presents time such situations practically do not meet. In rare cases avitaminoses are possible in consequence of diseases which result is the termination an absorption of vitamin or its strengthened destruction in a gastrointestinal tract. For avitaminoses the expressed clinical picture with strictly specific is characteristic attributes. They proceed easier, their displays are indistinct, less expressed, besides exist and the latent forms of such condition when the state of health worsens and working capacity without what or characteristic signs decreases.
Prevalence of obviously expressed avitamonous conditions and their latent forms is caused by many reasons, but more often - orientation of an individual delivery exclusively on satisfaction of gustatory inquiries without taking into account the concrete importance of vitamins for health, needs for them of an organism and their maintenances in food stuffs, let alone a consequence of use of those or other receptions.
The culinary processing, capable to blast vitamins. It is necessary to consider also, that avitamonous conditions can arise at long or wrong reception of antibiotics, Sulfanilamidums and other medical agents which suppress activity of a useful microflora of the intestine synthesizing essential quantities of some vitamins, or immediately binding and blasting vitamins. The reason of hypovitaminoses can be and the raised need for vitamins at strengthened physical and brainwork, at influence on an organism of adverse factors. That can be frigorisms, overheatings, stressful situations be, etc. Similar their reason the physiological conditions showing to an organism of an increased requirement, for example, pregnancy and feeding of the child can also. Reception of vitamins should be spent in strict conformity with references or under the control medical workers. Superfluous consumption of foodstuff, extremely vitamin-rich, or independent excessive reception of vitamin preparations
can lead to hypervitaminoses.
