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Each option is tailored to specific needs: energy, stress relief, immunity, metabolism, and anti-aging support

Frequency varies

To help you make a better decision, consider the following factors: Your Health Condition : If you have a medical condition that affects B-12 absorption (e.g., pernicious anemia), injections are usually more effective

Some vitamins are very difficult to get through diet and supplements are not always readily absorbed by the body

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Also searched were the Agency for Healthcare Research and Quality evidence reports, Clinical Evidence, the Cochrane database, Essential Evidence, the Institute for Clinical Systems Improvement, the National Guideline Clearinghouse database, and the U.S