A group of fat soluble vitamin and consist of vitamin K1 which is also known as phylloquinone or phytomenadione (also called phytonadione) and vitamin K2 (menaquinone, menatetrenone). Vitamin K plays an important role in blood clotting. Deficiency is very rare but can cause bleeding diathesis.
Mostly fat-soluble and heat stable. Essential for normal blood clotting. Found in alfalfa, cabbage, cauli- flower, spinach, soybeans and pork liver.
A fat-soluble vitamin. Its chief function is to aid in the coagulation of blood by promoting the formation of prothrombin. A deficiency of results in hemorrhaging, especially in infants born prematurely. Excessive amounts may result in the break down of red blood cells in infants.
A vitamin found in green vegetables such as spinach and cabbage, and which helps the clotting of blood and is needed to activate prothrombin.
A large number of compounds, all related to a 2-methyl-l,4 napthaquinone, possess vitamin K activity. Compounds isolated from plants have a phytyl radical at position 3 and are members of the K, family of compounds. Phylloquinone (2-methyl-3-phytyl-l,4 napthaquinone (II)) is the most important member of this family. The K vitamins are identified by their family and by the length of the side chain attached at position 3. The shorthand designation uses the letter K with a subscript to indicate family and a superscript to indicate the side chain length. Thus, K20/2 indicates a member of the family of compounds isolated from animal sources having a 20-carbon side chain. The character of the side chain determines whether a compound is a member of the K1or K2 family. Ki compounds have a saturated side chain whereas K2 compounds have an unsaturated side chain. Chain lengths of the K1 and K2 vitamins can vary from 5 to 35 carbons.
Vitamin K also referrred to as phylloquinone as the naturally occuring form in plants, is a fat-soluble vitamin needed for normal blood clotting and bone formation. Deficiency is linked to increased risk of hemorrhage as well as osteoporosis. Most dietary vitamin K is obtained from leafy, green vegetables such as spinach, lettuce and other salad greens, kale, collard greens, and broccoli, as well as other vegetables and legumes. Potential ergogenic roles of vitamin K have not been identified.
A vitamin that exists in several forms one from plant sources, one from animals and birds, and one made by bacteria in the intestines all essential to proper clotting of blood. Lack of vitamin K can cause hemorrhage and liver problems. The vitamin is abundant in spinach, lettuce, kale, cabbage, cauliflower, liver, and egg yolk. Synthetic forms are also available. Human milk is low in vitamin K, so the American Academy of Pediatrics Committee on Nutrition has recommended that vitamin K be routinely administered intravenously as part of parenteral nutrition to all infants at birth to prevent bleeding disorders.
Fat-soluble vitamin essential for blood coagulation and important in certain energy- transfer reactions. Rich sources include green leafy vegetables, egg yolk, yogurt, and fish-liver oils.
A vitamin whose deficiency may cause inadequate clotting of the blood.
A fat-soluble vitamin essential for blood clotting. It may also have a role in preserving the strength of bones. Good dietary sources of vitamin K include leafy green vegetables such as spinach, lettuce, and cabbage; liver; egg yolks; cauliflower; grain products; potatoes; fruits; and low-fat milk and cheese. Vitamin K is also synthesized by bacteria that normally reside in the large intestine. Prolonged use of antibiotics can lead to a vitamin K deficiency if dietary intake is not increased to compensate for the reduced amounts obtained from intestinal bacteria. A vitamin K deficiency can result in potentially fatal bleeding in the event of an injury.
A fat-soluble vitamin occurring in two main forms: phytomenadione (of plant origin) and menaquinone (of animal origin). It is necessary for the formation of prothrombin in the liver, which is essential for blood clotting, and it also regulates the synthesis of other clotting factors. A dietary deficiency does not often occur as the vitamin is synthesized by bacteria in the large intestine and is widely distributed in green leafy vegetables and meat.
An antihemorrhagic factor whose activity is associated with compounds derived from naphthoquinone. Vitamin K, which is fat soluble, is present in broccoli, collards, beet greens, (most green vegetables); vitamin K2, in fishmeal. Vitamin K3 is synthesized as menadione sodium bisulfite. Vitamin K is necessary for synthesis of clotting factors VII, EX, X, and prothrombin by the liver. Its deficiency prolongs blood-clotting time and causes bleeding. Its roles in bone metabolism include its requirement for the conversion of osteocalcin to its active form and its requirement for matrix Gla-protein (MGP) function in bones, teeth, and cartilage. Within the kidney, it acts to inhibit calcium oxalate stone formation. It appears to have a role in normal retinal signaling. In the newborn, the colon is sterile until food is ingested and bacteria colonize the site. Because this bacterial source of vitamin K is not immediately available, an intramuscular injection of 1 mg of water-soluble vitamin (phytonadione) is recommended for all newborns.
Vitamin K, a crucial nutrient, is necessary for the synthesis of prothrombin in the liver.
A vitamin that is soluble in fat, Vitamin K is crucial for creating compounds in the liver that facilitate blood coagulation. It can be found in foods like green vegetables, vegetable oils, egg yolks, cheese, pork, and liver. Additionally, this vitamin is produced by bacteria within the intestine.
A shortage of vitamin K from dietary sources is uncommon. However, individuals with nutrient absorption issues, specific liver conditions, or chronic diarrhea may experience a deficiency. Extended use of antibiotics can also lead to low levels of vitamin K. Since newborns lack the gut bacteria that generate this vitamin, they are typically provided with supplements to ward off deficiency. A lack of vitamin K can result in symptoms like nosebleeds and bleeding from the gums, intestines, and urinary tract. In extreme and rare cases, it could even cause a brain hemorrhage.
There are no known adverse effects associated with consuming too much vitamin K.