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While both options offer benefits, B12 shots are often favored for their quick absorption and potent dose delivery
Are B12 shots right for me
If serum levels are normal on oral supplementation, adding injections provides no additional benefit
In the withdrawal trial, continuing preserved loss far better than switching to placebo, which regained about 14% over a year. The metabolic benefit fades in proportion to the weight regained, so a taper plus protein and resistance training beats a hard stop
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