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But the right form, dose, and route depend entirely on why youre deficient and some causes (like pernicious anemia or malabsorption) wont respond to oral supplements at standard doses no matter how many you take
ISBN 978-1-60406-326-4
The trials of this meta-analysis employed different dosages of B vitamins, with vitamin B 12 included in four of five trials
Injections can help prevent neurological issues, particularly in individuals with deficiencies
But should you try it for yourself
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