Digestive System
Last updated on 24 Jul 2025
The vitamin B12 normal range in serum typically falls between 200 pg/mL and 900 pg/mL. For elderly individuals, maintaining levels between 300 to 350 pg/mL is considered ideal to support overall health.
There is no sure shot way to decrease vitamin B12 levels, however, research hints that drinking alcohol moderately helps in decreasing vitamin B12 levels to a certain extent.
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