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Linda Im in the USA and doctors here are reluctant to prescribe these shots unless there is a severe deficiency
[43] [41] During pregnancy the placenta concentrates B 12 , so that newborn infants have a higher serum concentration than their mothers
Methionine cannot be made by the body, so it must be consumed in the diet
Some people describe this as feeling mentally foggy or having trouble staying sharp during tasks that require attention
People who have undergone some sort of trauma to the intestines including a gastric bypass or intestinal surgery can be susceptible to vitamin B12 deficiencies since they may have less cells present to produce the protein to which the B12 can attach, resulting in a decreased ability to absorb B12 into the bloodstream
Also, in most people, methyl and adenosyl B12 can inter-convert easily, so the exclusive supplementation of methyl B12 is enough in most cases
