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If the window is wasted, if the person relies entirely on the appetite suppression without changing their food environment, cooking skills, or activity level, regain after discontinuation is nearly inevitable

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However, if your B12 levels are healthy, a shot is unlikely to be the answer to your exhaustion, as fatigue has many other potential origins

We are entirely dependent on dietary intake or supplementation, and even with adequate dietary intake, absorption can be impaired by a range of factors including age-related changes to stomach acid production, certain medications, and digestive conditions

These results can provide insight into whether a B12 deficiency exists