Oh my, I have been thinking about this lately. I had an acute kidney failure event last Sept. I now have severe kidney disease. In retrospect, I realized that I was never thirsty even in the summer heat. I was taking a diuretic and I think that plus my lack of thirst cause the crisis.
What is the definition of nutrition? Nutrition is the sum total of the processes involved in the taking in and the utilization of food substances by which growth, repair and maintenance of the body are accomplished. It involves ingestion, digestion, absorption and assimilation.
The word nutrition is also used to refer to the study of the substances an organism needs in order to survive. Those substances are known as nutrients. Some organisms, such as plants, require nothing other than a supply of light, water, and simple chemicals in order to thrive.