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b12 injection effect time How Quickly Does Shot Work? Duration of Benefits How Often Should You Get
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They were monitored by medical professionals

Oral versus intramuscular administration It is suggested that passive absorption of B 12 following sufficiently high oral doses (2000 mcg) can result in up to 10-12 mcg being absorbed daily7 and may allow serum B 12 concentrations to normalise

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However, this will require you carefully plan to meet your daily vitamin B12 requirements through three approximately equal doses of vitamin B12-fortified foods spread over three eating moments throughout the day
