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In a limited number of people, any vitamin B12 supplementation at all comes with some level of risk
Catching and correcting a confirmed deficiency early is generally simpler and less costly than treating the complications that a long-standing deficiency can cause
Cycle Length Typically 4-12 weeks depending on injury severity and treatment goals
Sometimes those problems turned deadly
Who Might Benefit from B12 Injections
For help managing injection-related [side effects](/guides/retatrutide-side-effects-management-guide), see our companion guide
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