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Always check with a pharmacist first
The metabolisation of each form is quite different and the effects differ considerably
Some people experience digestive upset from high-dose B12 supplements
This form is also easier for the body to utilise than cyanocobalamin
They may also be necessary when certain medications interfere with B12 absorption or in any other diagnosed condition specifically impacting B12 uptake
For example, one study found that after taking 1,000 mcg of oral vitamin B12, only about 1.3% (13 mcg) is absorbed into the bloodstream
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