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In the U.S., they are not FDA-approved for human use but are available for research purposes
Some people say it's better pre-workout
This distinction affects how the compound is absorbed, metabolized, and utilized in the body
Huang QF, Sheng CS, Li Y, Dou Y, Zheng MS, Zhu ZM, et al
If your diet is not allowing you to get enough of the B12 vitamin then a regular B12 injection regimen may be right for you
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