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Vitamin B12 is an essential nutrient that supports energy production, brain function, and red blood cell formation
Some people may start to feel different within hours of their first injection, while others may require a few weeks and several injections to really start to see a difference
For example, parameters that have been shown in other studies to alter cecal and fecal microbiomes (e.g., vendor source 62,63 ) were consistent across experimental groups in this study
But the benefit only applies if youre truly B12 deficient or at risk of becoming deficient
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