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For example, a 1,000 mcg dose might be in 1 mL of solution, but this can vary with different formulations
It is not recommended to take tetracycline and vitamin B12 simultaneously, and the reason is that tetracycline will interfere with the effectiveness and absorption of vitamin B12
At the same time, more of your existing NAD+ gets consumed by enzymes like CD38 and PARPs, which are activated by things like inflammation, oxidative stress, and DNA damage
Important limitations you should know For people with normal B12 levels, the evidence is far less compelling
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