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This is generally safe and does not usually cause any common side effects
8 One study compared the effectiveness of sublingual B12 with B12 injections for raising levels in patients with vitamin B12 deficiency
Because these symptoms can be subtle or overlap with other health issues, they often go undiagnosed for extended periods
These effects are essential for maintaining energy efficiency under metabolic stress, supporting research into fatigue resistance and cellular longevity
Improved overall sense of well-being
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