General Information On Diet And Nutrition

Nutrition examined the metabolic and physiological responses nutrition and physical. With the development of the fields of molecular biology, biochemistry and genetics, nutrition research is increasingly concerned about the metabolism and metabolic pathways: the sequence of biochemical steps through which the living substance to change from one form to another.

Nitrogen is necessary for animals to build protein. carnivorous and herbivorous diets vary in their source of nitrogen, which is a limiting nutrient for both. Herbivores feed on plants for nitrogen and carnivores eat other animals for nitrogen. Nitrogen is a common element in the atmosphere, but exists in a state that is not usable by most organisms. Some fungi and bacteria can convert atmospheric nitrogen into a form plants can absorb and use through fixing nitrogen.

The human body contains chemical compounds such as water, carbohydrates (sugar, starch and fiber), amino acids (proteins), fatty acids (fat) and nucleic acids (DNA and RNA). These compounds in turn consist of elements like carbon, hydrogen, oxygen, nitrogen, phosphorus, calcium, iron, zinc, magnesium, manganese, etc. All of these chemical compounds and elements occur in various forms and combinations (eg, hydroxyapatite hormones, vitamins, phospholipids) in both humans and plants and animals that humans eat.

The human body is composed of elements and compounds that are ingested, digested, absorbed and distributed in the blood to nourish the body's cells. Except in the fetus, which are processed nutrients from the mother, the digestive system is the first system involved in the degradation of the food before digestion. digestive juices secreted into the lumen of the gastrointestinal tract, the breaking of chemical bonds in ingested molecules and modulate their conformations and energy states. While some molecules are absorbed into the bloodstream unchanged, digestive processes release them from the food matrix. question did not pass, with some metabolic wastes from the body in the stool.

Studies of nutritional status must take into account the state of the body before and after the experiments, and chemical composition of total diet and all the material excreted and eliminated from the body (in urine and faeces). Comparison of food waste can help determine the specific compounds and elements absorbed and metabolized in the body. The effects of nutrients can not be felt for a long period, during which it should be all food and waste analysis. The number of variables involved in these experiments is high, making nutritional studies time-consuming and expensive, which explains why the science of human nutrition continues to evolve slowly.

As a rule, but a wide variety of fresh produce, eating whole foods (not processed) was beneficial to health compared to a monotonous diet based on processed foods.

In particular, the consumption of whole-plant foods slows digestion and allows for better absorption and a more favorable balance of essential nutrients per calorie, which will improve the management of cell growth, maintenance, and mitosis (cell division), as well as a better regulation of appetite and blood sugar. Regular meals (every few hours) have been healthier than rarely or randomly, although a recent study in the context of more frequent meals in a higher risk of colon cancer in men.