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Erectile dysfunction : Men with B12 deficiency may experience erectile dysfunction as a result of increased levels of homocysteine in the body (28)
If sleep problems persist despite appropriate dosing, addressing underlying factors such as insomnia, circadian rhythm issues, or other sleep disorders is more effective than adding extra melatonin
Proper medical oversight during administration minimizes these risks
Although not common, cyanocobalamin injections can also cause side effects such as diarrhea or a sensation that your entire body is swollen
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