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Bone Fractures In 2019, a study found an association between high intakes of vitamins B6 and B12 from food and supplements with the risk of hip fracture among postmenopausal women in the Harvard Nurses Health Study

Ease of Administration and Compliance: For certain types of research, particularly those involving numerous subjects or extended durations, the simplicity of oral administration can significantly improve adherence

Intramuscular injections bypass the digestive system to get the vitamins where they belong, for serious results

Remember, self-administration without proper medical guidance is not recommended and can potentially lead to adverse effects