Nutrient

A nutrient is a chemical that an organism needs to live and grow or a substance used in an organism's metabolism which must be taken in from its environment. They are used to build and repair tissues, regulate body processes and are converted to and used as energy. Methods for nutrient intake vary, with animals and protists consuming foods that are digested by an internal digestive system, but most plants ingest nutrients directly from the soil through their roots or from the atmosphere.

Organic nutrients include carbohydrates, fats, proteins (or their building blocks, amino acids), and vitamins. Inorganic chemical compounds such as dietary minerals, water, and oxygen may also be considered nutrients. A nutrient is said to be "essential" if it must be obtained from an external source, either because the organism cannot synthesize it or produces insufficient quantities. Nutrients needed in very small amounts are micronutrients and those that are needed in larger quantities are called macronutrients. The effects of nutrients are dose-dependent and shortages are called deficiencies.

See healthy diet for more information on the role of nutrients in human nutrition.

Read more about NutrientTypes of Nutrient, Essential and Non-essential Nutrients, Deficiencies and Toxicity

Other articles related to "nutrient, nutrients":

Casein Nutrient Agar
... Casein Nutrient Agar (CN) is a growth medium used to culture isolates of lactic acid bacteria such as Streptococcus thermophilus and Lactobacillus bulgaricus ... It is composed of standard nutrient agar with the added ingredient of skim milk powder, which contains casein ...
Nutrient Artery
... The medullary or nutrient artery (arteria nutricia), usually accompanied by one or two veins, sends branches upward and downward to the bone marrow ... Nutrient Arteries are the most apparent blood vessels of the bones ...
Nutrient - Deficiencies and Toxicity
... An inadequate amount of a nutrient is a deficiency ... Deficiencies can be due to a number of causes including inadequacy in nutrient intake called dietary deficiency, or conditions that interfere with the ... Some of the conditions that can interfere with nutrient utilization include problems with nutrient absorption, substances that cause a greater than normal need for a nutrient ...
Specific Appetite - Learned Appetite
... animal can learn to associate the positive effects of alleviation of a certain nutrient deficiency with consumption of that food ... of an animal's ability to detect the presence of a nutrient ... Because nutrient deficiencies of various types can have stressful effects which vary depending on the missing nutrient, subsequent ingestion of that nutrient is associated with relief ...
Soil Litter - Nutrient Cycle
... During leaf senescence, a portion of the plant’s nutrients are reabsorbed into the leaves ... The nutrient concentrations in litterfall differ from the nutrient concentrations in the mature foliage by the reabsorption of constituents during leaf senescence ... Plants that grow in areas with low nutrient availability tend to produce litter with low nutrient concentrations, but a larger proportion of the available nutrients is reabsorbed ...