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If youre deficient in vitamin B12, an injection will definitely give your energy level a boost
More efficient oxygen delivery to muscles can significantly improve endurance and performance
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Men and women 60 years or older have average dietary intakes of 5.6 g/day and 3.7 g/day, respectively (126)
Factors such as cost savings, convenience, absorption issues, potential digestion, and comfort with self-administering injections can affect patients preferences
Liver issues can also affect how B12 is used and stored
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