Search results
Results from the WOW.Com Content Network
"B12" and "Cbl" redirect here. For other uses of B12, see B12 (disambiguation). For the musical group, see Carbon Based Lifeforms. Pharmaceutical compound Vitamin B12 General skeletal formula of cobalamins Stick model of cyanocobalamin (R = CN) based on the crystal structure Clinical data Other names Vitamin B12, vitamin B-12, cobalamin AHFS / Drugs.com Monograph MedlinePlus a605007 License ...
Choline is synthesized by the human body, but not sufficiently to maintain good health, and is now considered an essential dietary nutrient. [35] Adenine is a nucleobase synthesized by the human body. [36] Carnitine is an essential dietary nutrient for certain worms, but not for humans. [37]
Although the healthy body stores three to five years' worth of B 12 in the liver, the usually undetected autoimmune activity in one's gut over a prolonged period of time leads to B 12 depletion and the resulting anemia; pernicious anemia refers to one of the hematologic manifestations of chronic auto-immune gastritis, in which the immune system ...
Vitamin B 12 cannot be produced by the human body, and must be obtained from the diet. [2] The body normally gets enough vitamin B 12 from the consumption of foods from animal sources. [2] Inadequate dietary intake of animal products such as eggs, meat, milk, fish, fowl (and some types of edible algae) can result in a deficiency state. [135]
The Schilling test has multiple stages. [3] As noted below, it can be done at any time after vitamin B 12 supplementation and body store replacement, and some clinicians recommend that in severe deficiency cases, at least several weeks of vitamin repletion be done before the test (more than one B 12 shot, and also oral folic acid), in order to ensure that impaired absorption of B 12 (with or ...
The Recommended Dietary Allowance (RDA) for vitamin B12 is 0.9-2.4 μg/day, while the estimated average requirement in the U.S. and Canada is 0.7-2 μg/day. Elderly individuals with plasma vitamin B12 levels below 148 pmol/L are considered severely deficient, and those with levels between 148 and 221 pmol/L are marginally deficient.
Hemoglobin in the blood carries oxygen from the respiratory organs (lungs or gills) to the other tissues of the body, where it releases the oxygen to enable aerobic respiration which powers an animal's metabolism. A healthy human has 12 to 20 grams of hemoglobin in every 100 mL of blood. Hemoglobin is a metalloprotein, a chromoprotein, and ...
12 family (the family of chemicals that function as B 12 when put into the body), because cyanocobalamin is the most air-stable of the B 12 forms. [22] It is the easiest [23] to crystallize and therefore easiest [24] to purify after it is produced by bacterial fermentation. It can be obtained as dark red crystals or as an amorphous red powder.