Vitamin B-12 is a water-soluble vitamin that is stored in the liver. Vitamin B-12 is a collective term for a group of cobalt-containing compounds known as corrinoids. The principal cobalamins are cyanocobalamin, hydroxocobalamin and the two coenzyme forms of Vitamin B-12, methylcobalamin and 5-deoxyadenosylcobalamin (adenosylcobalamin). Cyanocobalamin is the principal form of the vitamin used for fortification of foods and in nutritional supplements. Vitamin B-12 is also called cobalamin because it contains the metal cobalt. Vitamin B-12 is bound to the protein in food. Hydrochloric acid in the stomach releases B-12 from proteins in foods during digestion. Hydroxocobalamin is a man-made form of Vitamin B-12. The advantage using hydroxocobalamin is the lack of adverse effects seen with the nitrites such as methemoglobinemia and hypotension. It works by exchanging the hydroxy group for cyanide to form the non-toxic cyanocobalamin (Vitamin B-12).
But you don't want to put toxins into your body.
Our detoxification system is already overloaded with toxins, so you don't want to put extra stress on it.
Just use the natural form of vitamin B12 which is methylcobalamin or hydroxycobalamin.
Hydroxycobalamin also has detoxifiying effects and is used for cyanide poisoning for example.
But it's also very expensive, so I would use Methylcobalamin.
Cobalamin is a term which summarizes all forms of vitamin B12.
Cyanocobalamin is just one form of vitamin B12.
It's a synthetic form and doesn't occur naturally and this is not the form the body gets its vitamin b12.
Cyanocobalamin is also toxic because there is a cyanide molucule attached to the cobalamin.
Cyanide is highly toxic.
Some people have become blind using cyanocobalamin.
But this is very rare because normally the body can handle it.