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Vitamin B 12 is the most chemically complex of all vitamins, [6] and for humans the only vitamin that must be sourced from animal-derived foods or supplements. [2] [7] Only some archaea and bacteria can synthesize vitamin B 12. [8] Vitamin B 12 deficiency is a widespread condition that is particularly prevalent in populations with low ...
Alcohol. Consider this another good reason to cut back on drinking. ... The most surefire way to get sufficient B12 from food is by eating animal-based products including, meat, poultry, seafood ...
Instead, it measures a bacterial response to the food. Chemical variants of the B 12 vitamin found in plant sources are active for bacteria, but cannot be used by the human body. This same phenomenon can cause significant over-reporting of B 12 content in other types of foods as well. [6]
Vegans, and to a lesser degree vegetarians, are at risk for B 12 deficiency if they do not consume either a dietary supplement or vitamin-fortified foods. Children are at a higher risk for B 12 deficiency due to inadequate dietary intake, as they have fewer vitamin stores and a relatively larger vitamin need per calorie of food intake. [135]
Vitamin B12 foods. B12 is found in a wide array of animal-based foods, as it's produced by a gut bacteria that is then accumulated in the muscle tissue of most herbivorous animals, including fish ...
Animals, including humans, can convert cyanocobalamin to any one of the active vitamin B 12 compounds. [21] Cyanocobalamin is one of the most widely manufactured vitamers in the vitamin B 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]
Hydroxocobalamin, also known as vitamin B 12a and hydroxycobalamin, is a vitamin found in food and used as a dietary supplement. [1] As a supplement it is used to treat vitamin B12 deficiency including pernicious anemia. [1] [2] Other uses include treatment for cyanide poisoning, Leber's optic atrophy, and toxic amblyopia.
The efficacy of methylcobalamin administration in treating vitamin B12 deficiency remains uncertain. While directly providing active cobalamin forms to deficient patients is an attractive approach promoted by the manufacturers of methylcobalamin products, it is not known whether methylcobalamin can reach its intracellular targets in its ...