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It is essential in the formation of red blood cells, the metabolism of cells, the function of nerves, and DNA production
Five clinical trials met the inclusion criteria
Commonly reported side effects include mild pain, swelling, or itching at the injection site and sometimes nausea
On the other hand, iron is a potent pro-oxidant
Research from the International Journal of Food Sciences and Nutrition showed that cooking at high temperatures can reduce the glutathione content in foods by up to 60%
The timeframe for noticeable changes with vitamin B12 shots varies from person to person
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