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Tissue nutrition is the continuous process which is established just after the conception and persists throughout the life. Ayurveda scholars have mentioned that the manner of tissue nutrition is not same in all phases of life. In prenatal life embryo gets nutrition by Upasneha (filtration) and Upasweda (percolation/secretion) and fetus by Garbhanabhinadi (umbilical cord) which is attached with the heart of mother via Rasavahanadi (blood vessels). Thus in intrauterine life the nutrition of embryo is histotrophic, whereas just after the formation of placenta nutrition becomes haemotrophic. In post-natal life nutrition is enteral means nutrients are taken in the form of food via mouth called Aahar. Ayurveda scholars have postulated theories to understand the mechanism of tissue nutrition are Ksheera Dadhi Nyaya (transformation of nutrients), Khale Kapota Nyaya (selective uptake of nutrients), KedariKulya Nyaya (transportation of nutrients via channels), Ek Kala Dhatu Poshan Nyaya (simultaneous supply of nutrients to whole body). The theories of tissue nutrition discussed in Ayurveda suggest that although tissues are nourished and replenished continuously at different rate as per the functional state of Agni by circulating nutrients obtained from Ahara, but tissues are also dependent on each other for their proper nourishment and metabolism. This concept has great implication in management of malnourishment and various other disorders. This manuscript is an attempt to explore the Ayurveda's view on tissue nutrition along with physiological and clinical significance of theories of tissue nutrition in a scientific manner.
Agrawal et al. (Mon,) studied this question.
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