搜尋結果
Foods containing vitamin B 12 include meat, shellfish, liver, fish, poultry, eggs, and dairy products. [2] . Many breakfast cereals are fortified with the vitamin. [2] . Supplements and medications are available to treat and prevent vitamin B 12 deficiency. [2] .
Cyanocobalamin is a form of vitamin B. 12 used to treat and prevent vitamin B. 12 deficiency except in the presence of cyanide toxicity. [7] [8] [2] The deficiency may occur in pernicious anemia, following surgical removal of the stomach, with fish tapeworm, or due to bowel cancer.
Vitamin B12. Media in category "B vitamins" The following 20 files are in this category, out of 20 total. Averages (%) of foods containing appropriate folate levels (to achieve adequate folate intake) based on the proposed method in food groups.jpg 3,508 × 2,481; 1.63 MB.
B vitamins are a class of water-soluble vitamins that play important roles in cell metabolism and synthesis of red blood cells. [1] [2] They are a chemically diverse class of compounds. Dietary supplements containing all eight are referred to as a vitamin B complex.
Pernicious anemia is the most common cause of clinically evident vitamin B 12 deficiency worldwide. [14] Pernicious anemia due to autoimmune problems occurs in about one per 1000 people in the US. Among those over the age of 60, about 2% have the condition. [8]
It primarily serves to protect cobalamin (Vitamin B12) from acid degradation in the stomach by producing a HC-Vitamin B 12 complex. Once the complex has traveled to the more pH-neutral duodenum, pancreatic proteases degrade haptocorrin, releasing free cobalamin, which now binds to intrinsic factor for absorption by ileal enterocytes.
Serum vitamin B12 is a medical laboratory test that measure vitamin B 12 only in the blood binding to both transcobalamins. [1] . Most of the time, 80–94% of vitamin B 12 in the blood binds to haptocorrin, while only 6–20% is binds to transcobalamin ll. [2] Only transcobalamin ll is "active" and can be used by the body. [1] .
