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Yes, older adults or people with conditions like pernicious anemia may need more time to absorb B12 properly
For this reason, people in this age group are often recommended to either take supplements, eat fortified foods or get regular injections
No, B12 injections are not available over the counter
However, intramuscular shots release B12 gradually from muscle tissue, while IV infusions deliver the full dose into the bloodstream immediately
Energy Levels: Vitamin B12 is essential for energy production and can help combat the fatigue and low energy levels that some people experience during the dark, cold months of winter
The FDA also noted major evidence gaps for subcutaneous, topical, and nasal exposure, so the trial record does not establish safety for those routes
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