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Human data is still limited, so individual results vary which is exactly why this is done with monitoring rather than guesswork
The effects of Vitamin B12, a key component, can last for several days to a week, but this can vary depending on how quickly an individuals body uses or excretes it
There might be risk of drug interaction when you take vitamin b1, b6, and b12 injection with other supplements
This would explain the increase in lean body mass
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