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Plant foods contain effectively zero bioavailable B12

The choice of supplementation method depends on the severity of the deficiency and the underlying cause

Choose Vitamin B12 Injections If: Deficiency is severe Neurological symptoms are present Digestive absorption is impaired Rapid improvement is required Choose Oral Supplements If: Deficiency is mild Absorption is intact You prefer a non-invasive method Long-term maintenance is needed There is no universal answer to B12 injections vs oral supplements which is better?"

Are there reasons to avoid B12 shots

While it's one of the largest muscles, it can be hard to access alone, so you'll need a partner