Folic Acid, vitamin B9 is not a substitute for methylcobalamin, vitamin B12 deficiency, although it may improve vitamin B12 megaloblastic anemia
Food Chemistry, 135 (3), 19681974
When to seek medical advice Contact a GP promptly if symptoms are persistent, worsening or unexplained, especially if you have numbness, pins and needles, balance or walking problems, weakness, memory changes, breathlessness, palpitations or vision changes
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