Manganese dietary sources

In this test the tea-making procedure is standardised for the purpose of finding out if different amounts of manganese and zinc are released into the infusion from different types of tea. Tea leaves may contain large amounts of manganese and zinc but only relatively small proportions get into the infusion. Most of the metallic elements remain as insoluble complexes with organic compounds in the leaves. However, tea may still be an important dietary source of manganese and zinc. 

For infants the UL could not be set because. There is concern about the potential toxicity for infants whose immature hepatic develop-the biliary excretion of excess manganese, only dietary source of manganese in the age months should be from normal diet or from... 

Manganese and molybdenum are essential for enzymes in humans and other animals, but a dietary deficiency of these minerals is exceedingly rare in humans. Oobalt is essential for vitamin B12, but the human body cannot make vitamin B12 from cobalt and thus requires the preformed vitamin from dietary sources. (It is possible to derive some vitamin B12 from bacterial synthesis in the digestive tract.)... 

Mineral constituents are essential for normal development of humans. As essential elements are not synthesized in body they must be obtained from dietary sources. They play important roles in the metabolic functions. Calcium and phosphorus are essential for bone structure, potassium and sodium are involved in the functions of all organs, iron, copper and manganese are important for enzymatic functions. Cornelian cherry fruits, being rich in essential elements, might be considered as important nutritional supplements. 

Potato peels are waste by-products of the potato-processing industry. They are a good source of vitamin C, vitamin Be, copper, potassium, manganese, and dietary fiber. They also contain a... 

Manganese is a nutritionally important trace element for chicks. Dietary energy and protein sources contain very little bioavailable Mn, and these feed ingredients reduce the biopotency of inorganic Mn supplements. This adverse effect is exerted primarily in the intestine as a result of reduced Mn absorption and is mediated by the fiber and/or ash components of the feedstuffs. Gut absorption efficiencies are higher when a phytate-and fiber-free casein-dextrose diet is fed than when a corn-soybean meal diet is fed. Dietary interrelationships exist between Mn and Co and between Mn and Fe. Cobalt increases Mn absorption and may precipitate Mn toxicosis. Excess dietary Mn reduces Fe utilization, but excess Fe does not affect Mn utilization. Eimeria acervulina infection increases Mn absorption. 

Wheat bran and whole wheat cereals quantitatively contain high amounts of manganese and are often listed as particularly valuable sources of manganese. However, zinc also is contained in appreciable amounts in wheat bran and whole wheat products but is poorly absorbed by the human from these sources. This has been attributed to either the phytate or the fiber contents of these products or a combination of these two dietary factors. These same factors may also affect the absorption of manganese. 

Wheat bran contains several different forms of dietary fiber including hemicellulose. Some but not all purified dietary fiber sources have been found to have an adverse effect on manganese bioavailability (10). 

An RDA for manganese has not been established. A provisional dietary Mn intake for adults of 2 to 5 mg/day is recommended by the National Research Council. Manganese deficiency rarely occurs and has not yet been documented in any specific population. Mn is found in grains, fruits, and vegetables. Meat, fish, and dairy products are relatively poor sources of the mineral-... 

Red raspberries are one of the plant worlds richest sources of vitamins C and K, the essential mineral manganese, and dietary fiber. Contents of vitamin A (from seed carotenoids), B vitamins 1 through 3 (thiamin, riboflavin, niacin, respectively), iron, calcium, and potassium are also at good levels. 

In addition, the essential dietary minerals calcium, iron, potassium, manganese, and magnesium are exceptionally high in content. Phytosterols and omega-3 fat sources (from alpha-linolenic acid) also are pres-... 

Date pulp is low in fat and protein but rich in sugars, mainly fructose and glucose, making it a potent source of caloric energy. It contains excellent amounts of amino acids for protein dietary minerals such as selenium, potassium, calcium, magnesium, manganese, and iron several B vitamins vitamin C omega fatty acids phytosterols and both insoluble and prebi-... 

Sources Dietary Reference Intakes for Calcium, Phosphorous, Magnesium, Vitamin D, and Fluoride (1997) Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin Folate, Vitamin B, Pantothenic Acid, Biotin, and Choline (1998) Dietary Reference Intakes for Vitamin C, Vitamin E, Selenium, and Carotenoids (2000) Dietary Reference hitakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc (2001) Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids (2002/2005) and Dietary Reference Intakes for Calcium and Vitamin D (2011). These reports may be accessed via www.nap.edu... 

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