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Serious adverse events have not been widely reported in the community, but the lack of long-term safety data means unknown risks may exist
According to research conducted in 2008, the body only absorbs about 1.3% of a 1,000 mcg oral dose of B12
People over 50 are most at risk because your gut absorbs less B12 as you age
Contact your GP if you experience: No improvement after 46 weeks of treatment : Whilst neurological symptoms may take longer to resolve, you should notice some improvement in energy levels or general wellbeing within this timeframe
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