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Key takeaways: Vitamin B12 is found in foods including meat, fish, shellfish, eggs, dairy and fortified products
The mean patient age was 59 years
GI side effects in clinical trials typically resolved within 23 weeks, but if symptoms persist beyond four weeks at a reduced dose, discontinuation is warranted
Through this method, maximum absorption is achieved by bypassing the digestive system
It could point to several things: A different cause: your fatigue might stem from thyroid problems, iron deficiency, or sleep apnea rather than B12
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