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[4] However, consistently taking large amounts of vitamins from multiple sources could potentially increase the risk of side effects (for example, very high vitamin B intake from multiple supplements over time can cause neuropathy, and high niacin from many sources could affect your liver)
1 The British Society for Haematology does not recommend retesting vitamin B 12 levels after treatment has been initiated, and no guidelines address the optimal interval for screening high-risk patients
Haematological parameters (such as haemoglobin and red blood cell indices) typically begin to normalise within one to two weeks
Its structure was confirmed by mass spectrometry and amino acid analysis [2]
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