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The body needs vitamin B12 to metabolize proteins and fats properly and to turn carbs into glucose, which is used as fuel
The immediate energy boost can last from a few days to a week
The volume is small, often 0.1 to 0.3 mL, so read the syringe markings carefully rather than eyeballing it
The timeline for initial weight loss varies between individuals, and the same applies to tirzepatide
But if you are deficient, correcting that deficiency can restore the energy and metabolic function that low B12 drains, and that can make weight loss easier
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