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Some fortified plant-based foods, such as breakfast cereals and nutritional yeast, also contain vitamin B12
Ming Zhang, Wenjuan Han, Sanjue Hu, and Hui Xu*
Archived from the original on 29 October 2019
The results of B12 injections typically last for several weeks to several months
Some individuals may experience mild injection-site reactions (e.g., redness, swelling) or occasional headaches
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