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Most people can benefit from taking vitamin B12, but its especially important for those who are trying to lose weight
It tells us whether your symptoms are likely from low B12 or from something else, so you do not spend money on a shot that was never going to be the fix
10.18637/jss.v036.i03 61 YamaneK.UsuiT.YamamotoT.TsukamotoT.SomaY.YoshimuraN.et al (1995)
These include the patients health history, how bad the B12 deficiency is, and how they react to the first treatment
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