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For people with hormonal barriers to weight loss, hormone replacement therapy may address the root cause
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Within 24 to 72 hours, many people report an increase in energy levels and a reduction in fatigue
For example, one study found that after taking 1,000 mcg of oral vitamin B12, only about 1.3% (13 mcg) is absorbed into the bloodstream
Your body's ability to process and utilize vitamin B12 can be influenced by genetics, diet, and underlying health conditions
Injections may be recommended when: There is impaired absorption (for example, pernicious anaemia)
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