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If you are new to both, introduce them one at a time with at least four weeks between introductions so you can identify the source of any reaction
However, B12 is unique: whilst it is water-soluble, the liver stores substantial reserves lasting several years
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Bacteriostatic water is suitable for use in research settings that require measured withdrawals over time when handled in accordance with standard laboratory practices
Many people develop low vitamin B12 levels gradually
Insulin is a very safe choice in pregnancy as it does not cross the placenta and reach the fetus
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