News tagged with nutrients
Related topics: cells , protein , plants , blood vessels , cancer cells
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.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.
Potatoes and other white vegetables are just as important to a healthy diet as their colorful cousins in the produce aisle, according to the authors of a scientific supplement published yesterday in the peer-reviewed journal, ...
Other May 15, 2013 | 5 / 5 (1) | 0
For the first time, researchers at Karolinska Institutet in Sweden have managed to obtain detailed images of the way in which the transport protein GLUT transports sugars into cells. Since tumours are highly dependent on ...
Cancer Apr 28, 2013 | 4.7 / 5 (3) | 0 |
One of 100,000 children is born with Menkes disease, a genetic disorder that affects the body's ability to properly absorb copper from food and leads to neurodegeneration, seizures, impaired movement, stunted ...
Medical research Apr 30, 2013 | not rated yet | 0 |