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Because B12 is so closely linked to energy production and normal bodily function, it has become a common supplement in wellness and weight-loss settings
Injections bypass digestion entirely, while supplements rely on it
Common side effects include nausea, vomiting, constipation, and appetite changes
Vitamin B12 (with folic acid and vitamin B6) can lower homocysteine levels, but scientists dont know yet whether these vitamins actually help prevent or treat dementia
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