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Oral intake only allows you to make use of about 50-60% of a given substance
These are not over-the-counter medications and should be used under the supervision of your healthcare professional to ensure safety and effectiveness
A 2020 study found that the death rate among people with the highest levels of B12 in their bodies was almost twice as high as that of people with the lowest levels of B12
Note that the numbers in parentheses (1, 2, etc.) are clickable links to medically peer-reviewed studies
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