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doi:10.1309/cvhkle2r4w68k2nq
Deficiencies of the nutrient can cause a range of mild to severe side effects
5 Conclusion This systematic review and meta-analysis indicate that sublingual and oral vitamin B12 administration provide efficacy comparable to intramuscular injection in improving serum cobalamin levels and reducing hyperhomocysteinaemia
Vitamin B12 deficiency, if left untreated, can lead to neurological problems
Have you ever given yourself an injection
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