منابع مشابه
Phylloquinone (vitamin K1) content of vegetables
Assessment of vitamin K (VK) dietary intakes has been limited by incomplete VK food composition data for the US food supply. The phylloquinone (VK-1 or vitamin K1) concentrations of a variety of geographically representative vegetables (n 1⁄4 218) were determined by reversed-phase high performance liquid chromatography with fluorescent detection. Green leafy and flower vegetables including broc...
متن کاملPlasma vitamin K1 concentrations in cystic fibrosis.
Plasma concentrations of vitamin K1 were similar in 37 patients with cystic fibrosis (median 46 ng/l) and 16 controls (49 ng/l). The plasma concentrations were lower than those previously described in adults, but higher than in neonates. There was no association between an increase in prothrombin time and vitamin K1 plasma concentration.
متن کاملDietary vitamin K1 requirement and comparison of biopotency of different vitamin K sources for young turkeys.
In a preliminary experiment, the inclusion of vitamin K1 (K1) at a dietary level of 0.1 mg/kg was as effective as 1 or 2 mg/kg in reducing plasma prothrombin time (PT). To obtain an estimate of the dietary K1 requirement and to compare the biopotency of different vitamin K sources for poults, three additional experiments were conducted. In Experiment 1, an incomplete factorial arrangement of tr...
متن کاملAllergic contact dermatitis due to cosmetics containing vitamin K1 oxide.
Vitamin K denotes a group of molecules that are needed for the synthesis of certain proteins, mostly required for blood coagulation. Five isoforms of vitamin K exists: vitamin K1, K2, K3, K4, and K5. Vitamin K1 (phytonadione, CAS number 84-800/81818-54-4) has been widely used in cosmetics as it is claimed to reduce the purpura and hyperpigmentation associated with surgical and laser therapies (...
متن کاملVitamin K-containing dietary supplements: comparison of synthetic vitamin K1 and natto-derived menaquinone-7.
Vitamin K is a cofactor in the production of blood coagulation factors (in the liver), osteocalcin (in bone), and matrix Gla protein (cartilage and vessel wall). Accumulating evidence suggests that for optimal bone and vascular health, relatively high intakes of vitamin K are required. The synthetic short-chain vitamin K(1) is commonly used in food supplements, but recently the natural long-cha...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1939
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)73601-6