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Another source of deficiency can be malabsorption issues, where the body is unable to properly absorb B12 from the intestines due to various gastrointestinal disorders
The most commonly reported effects are minor and transient: mild injection site reactions, temporary fatigue, and occasional mild headaches
Pharmaceuticals 17(12):1631
Study 7: The only published clinical data in humans Citation: Veljaca M., Pavic Sladoljev D., Mildner B., et al
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