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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
Look for HPLC purity data and mass spectrometry confirmation of identity
Just taking large amounts of B12 supplements does not mean that your body will be able to use all of it
High blood levels of homocysteine pose a risk for vascular and cognitive health
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