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Description
An overview of current management

In a supplement containing 50 mcg of Vitamin B12, you absorb about 1.5 mcg of thatand only 0.1 to 0.6 mcg if you have a problem with absorption or have pernicious (autoimmune) anemia

Current evidence suggests that high-dose B12 supplementation can trigger acne in susceptible people by altering skin bacteria behaviour, though this does not affect everyone
But supplements should be used with caution

J Alzheimers Dis 5, 127137

Some people describe this as feeling mentally foggy or having trouble staying sharp during tasks that require attention
