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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.
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. [3] [4] It is given by injection into a muscle or vein, [2] by pill or sublingually. Side effects are generally few. [2]
This synthesis of vitamin B 12 is of no practical consequence due to its length, taking 72 chemical steps and giving an overall chemical yield well under 0.01%. [140] Although there have been sporadic synthetic efforts since 1972, [ 139 ] the Eschenmoser–Woodward synthesis remains the only completed (formal) total synthesis.
“Vitamin B12 requirements are low because we can store up to 2,500 micrograms in the liver,” says Ryan D. Andrews, R.D., C.S.C.S., principal nutritionist at Precision Nutrition. So target just ...
MyKind Organics Vegan B12 Spray. Made with methylcobalamin and oodles of organic fruit and botanicals, one spray a day tastes like raspberries while delivering 500 micrograms of vitamin B12. Plus ...
The structural difference between vitamin D 2 and vitamin D 3 lies in the side chain: vitamin D 2 has a double bond between carbons 22 and 23, and a methyl group on carbon 24. Vitamin D analogues have also been synthesized. [3]
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